=0;i--) { ret[i] = (i*b+(n-i)*a)/n; }\n return ret;\n}"
},
{
"Name": "changeOrientation",
"Active": "true",
"Internal": "false",
"Type": "LIBRARY_EDITOR",
"Comment": "",
"Code": "// code to be copied to EJSS source code under Custom and used in drawingPanel3D and plottingPanel2D\n// address the problem is height difference is iOS app , epub, and Firefox\n// user need to change only k and kepub\n// copy %changeOrientation()% into the Height Field of drawingPanel3D and plottingPanel2D\nfunction changeOrientation() {\n \nvar k =0.80 ; // k control height 1 is for full screen, 0.9 shorten etc\nvar kapple =0.90 // control apple app height\nvar kepub =0.90 ;\n// check platform for Apps\ntry { // allow code to run in Student Learning Space \n var iOSapp = (typeof parent.device != 'undefined' && parent.device.platform == \"iOS\");\n var Androidapp = (typeof parent.device != 'undefined' && parent.device.platform == \"Android\");\n} catch(e) {\n var iOSapp = false;\n var Androidapp = false;\n}\n// check platform for web browsers\nvar iOS =/iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;\nvar iPad =/iPad/.test(navigator.userAgent) && !window.MSStream;\nvar iPhone = /iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;\nvar Android= /Android|android/i.test(navigator.userAgent);\n\n//navigator\nvar Firefox = navigator.userAgent.indexOf(\"Firefox\") != -1;\n \nswitch (window.orientation) { // using window.orientation as deciding factor\n case 0:\n case 180:\n this.screenOrientation = 'portrait';\n if (iOSapp){ // does not seems to work\n \n return window.screen.height*kapple; //0.1 for app and 0.1 for nonfullscreenapp \n \n }\n else if (_isEPub){ // does not seems to work\n // return Math.max(window.screen.width,window.screen.height)*0.9;\n return window.innerHeight*kepub; //0.1 for app and 0.1 for nonfullscreenapp \n // return window.screen.height;\n // return window.innerHeight;\n // return document.documentElement.clientHeight;\n }\n \n else {\n \n return 100*k+\"vh\";\n }\n break;\n case 90:\n case -90:\n this.screenOrientation = 'landscape';\n \n if (iOSapp){ // App\n return window.screen.width*kapple; \n // return window.screen.height;\n // return window.innerHeight;\n // return document.documentElement.clientHeight;\n }\n else if (_isEPub){ // does not seems to work\n // return Math.max(window.screen.width,window.screen.height)*0.9;\n return window.innerHeight*kepub; //0.1 for app and 0.1 for nonfullscreenapp \n // return window.screen.height;\n // return window.innerHeight;\n // return document.documentElement.clientHeight;\n }\n \n else {\n return 100*k+\"vh\";\n }\n break;\n default:\n this.screenOrientation = 'unknown';\n // return (iPad)?\"\"+(window.screen.width+window.screen.height)*0.4:((iPhone)?\"\"+window.screen.width:_view._format(window.innerHeight*0.9,\"0\"));\n if (Firefox){\n return window.innerHeight*k;// number as of 20180831 Firefox does not support vh yet so need a separate line to handle\n }\n // else if (iOS&&(window.orientation==0)||(window.orientation==180)){\n // return window.screen.height*k;// number as of 20180831 Firefox does not support vh yet so need a separate line to handle\n // }\n // else if (iOS&&(window.orientation==90)||(window.orientation==-90)){\n // return window.screen.width*k;// number as of 20180831 Firefox does not support vh yet so need a separate line to handle\n // }\n else {\n //alert();\n // return 100*k+\"%\"; // work on fullscreen works in EJSS6.0beta\n // works in EjsS_5.3_180131\n return window.innerHeight*k; // work on panel \n \n}\n\n}\n \n}"
},
{
"Name": "speech",
"Active": "true",
"Internal": "false",
"Type": "LIBRARY_EDITOR",
"Comment": "",
"Code": "// copy this custom function\n// in iOS need to add speech to the play button as On iOS the API works but must be triggered by a user action callback, like a response to a tap event, to provide a better experience to users and avoid unexpected sounds out of your phone\nfunction speech (option) {\n\n\ntry { // allow code to run in Student Learning Space \nvar isCordova = (!!this.parent.cordova || !!window.cordova);\nif(isCordova) { // check it is running in Android or iOS\n // parent.TTS.speak({text:option,locale:'zh-CN'});\n\tparent.TTS.speak({text:option,locale:'us-EN'});\n\t// parent.TTS.speak({text:option,locale:'en-US'});\n\t// parent.TTS.speak({text:option,locale:'id-ID'});\n} \n} \ncatch(e) {\n var isCordova = false;\n }\n \n var msg = new SpeechSynthesisUtterance(option);\n\n //https://stackoverflow.com/questions/43983845/speechsynthesis-api-for-chinese-firefox\n // Set the text.\n\t//msg.text = option; \n\t//https://forums.developer.apple.com/message/323564#323564\n\t// comment out the next 2 lines for english\n//msg.voice = speechSynthesis.getVoices().filter(function(voice) { return voice.name == 'Ting-Ting'; })[0];\n//msg.lang = 'zh-CH'; // need for android?\n//msg.lang = 'id-ID'; // need for android?\nmsg.lang = 'us-EN'; // need for android?\n\n//https://flaviocopes.com/speech-synthesis-api/\n//debug\n//console.log(`Voices #: ${speechSynthesis.getVoices().length}`)\n//speechSynthesis.getVoices().forEach(voice => {\n// console.log(voice.name, voice.lang)\n//})\n//debug\n\n// Queue this utterance.\nwindow.speechSynthesis.speak(msg);\n\n\n\n \n\n}"
},
{
"Name": "hint1",
"Active": "true",
"Internal": "false",
"Type": "LIBRARY_EDITOR",
"Comment": "",
"Code": "function hint1() { //hints for initial stages\n if (open==true){\n return \"Switch is open, press Play to close the circuit.\"\n }\n if (open==false && yIron>-8 && pickupstate==false && yPlastic>-8){\n return \"Drag the rod closer to attract the paper clips.\"\n }\n}"
},
{
"Name": "hint2",
"Active": "true",
"Internal": "false",
"Type": "LIBRARY_EDITOR",
"Comment": "",
"Code": "function hint2(){//hints for final stage to inform user to Press Reset button\n if (captured==true){\n return \"Click Reset Setup to choose a different set of variables\"\n }\n if (open==true){\n return \"Feel free to change the variables\"\n }\n else {\n return \"\"\n }\n}"
},
{
"Name": "hints",
"Active": "true",
"Internal": "false",
"Type": "LIBRARY_EDITOR",
"Comment": "",
"Code": "function hints () { //to compile all the hints based on criteria\n if (open==true){\n return \"Switch is open, press Play to close the circuit.\"\n }\n if (open==false && yIron>-8 && pickupstate==false && yPlastic>-8 && captured==false){ // to inform user to move the rod closer\n return \"Drag down the rod to attract the paper clips and \\nup to see the amount of paperclips attracted. \"\n }\n if (material==1){ //when the material is iron\n if (pickupstate == true && paperclipno != 5){\n return \"The rod has attracted \" + paperclipno + \" number of paper clips.\"\n }\n if (pickupstate == true && paperclipno == 5){\n return \"The rod has reached its maximum magnetic strength.\"\n }\n if (open==false && battDef==false){\n return \"The batteries are low, the electromagnet is weak.\"\n }\n if (open==false && voltage <1.6 || captured==false){\n return \"The rod is not strong enough to attract any paper clips.\"\n }\n }\n if (material==2){ //when the material is plastic\n if (open==false){\n return \"The rod is made out of plastic and it is not a magnetic material.\\nTherefore, it cannot attract any of the paper clips.\"\n }\n }\n}"
},
{
"Name": "battType",
"Active": "true",
"Internal": "false",
"Type": "LIBRARY_EDITOR",
"Comment": "",
"Code": "function battType(battDef) {\n if (battDef==true){\n return \"(F)\"\n }\n else {\n return \"(L)\"\n }\n}"
},
{
"Name": "materialType",
"Active": "true",
"Internal": "false",
"Type": "LIBRARY_EDITOR",
"Comment": "",
"Code": "function materialType(material) {\n if (material==1){\n return \"Iron\"\n }\n if (material==2){\n return \"Plastic\"\n }\n}"
},
{
"Name": "sizeType",
"Active": "true",
"Internal": "false",
"Type": "LIBRARY_EDITOR",
"Comment": "",
"Code": "function sizeType (sizeL) {\n if (sizeL==true){\n return \"L\"\n }\n if (sizeL==false){\n return \"S\"\n }\n}"
},
{
"Name": "comboxSet",
"Active": "true",
"Internal": "false",
"Type": "LIBRARY_EDITOR",
"Comment": "",
"Code": "// placed at reset setup button and init undefined to capture all use cases\nfunction comboxSetCorrectly () {\nif (material==1){\n_view.comboBox.setSelectedOptions([\"iron\"]);\n}\nelse if (material==2){\n_view.comboBox.setSelectedOptions([\"plastic\"]);\n}\n\n\nif (sizeL==true){\n_view.comboBox2.setSelectedOptions([\"large\"]);\n}\nelse if (sizeL==false){\n_view.comboBox2.setSelectedOptions([\"small\"]);\n}\n\nif (battDef==true){\n\n_view.comboBox3.setSelectedOptions([\"Full\"]);\n}\nelse if (battDef==false){\n\n_view.comboBox3.setSelectedOptions([\"Low\"]);\n}\n\n\n}\n"
}
]
},
"elements": {
"list": []
}
},
"view": {
"Tree": [
{
"Name": "fullscreen",
"Type": "Panel",
"Expanded": "true",
"Properties": [
{
"name": "Width",
"value": "Width"
}
],
"Children": [
{
"Name": "control",
"Type": "Panel",
"Expanded": "true",
"Properties": [
{
"name": "Background",
"value": "\"rgba(192,235,255,1)\""
},
{
"name": "BorderColor",
"value": "\"black\""
},
{
"name": "BorderWidth",
"value": "1"
},
{
"name": "Font",
"value": "font"
}
],
"Children": [
{
"Name": "inlienflex",
"Type": "Panel",
"Expanded": "true",
"Properties": [
{
"name": "Width",
"value": "\"100%\""
},
{
"name": "Display",
"value": "\"inline-flex\""
}
],
"Children": [
{
"Name": "coils2",
"Type": "Panel",
"Expanded": "true",
"Properties": [
{
"name": "Background",
"value": "\"DarkGray\""
},
{
"name": "Width",
"value": "\"50%\""
},
{
"name": "Display",
"value": "\"block\""
}
],
"Children": [
{
"Name": "coils3",
"Type": "Label",
"Properties": [
{
"name": "Text",
"value": "\"no. of coils =\" + coilNo"
},
{
"name": "Font",
"value": "font"
}
]
},
{
"Name": "slider2",
"Type": "Slider",
"Properties": [
{
"name": "Minimum",
"value": "1"
},
{
"name": "Maximum",
"value": "3"
},
{
"name": "Value",
"value": "coilCounter"
},
{
"name": "OnChange",
"value": "if (coilCounter==1){\n coilNo=3;\n coilRes=0.75;\n }\nelse if (coilCounter==2){\n coilNo=5;\n coilRes=1;\n }\nelse if (coilCounter==3){\n coilNo=9;\n coilRes=1.25;\n }\n \n"
},
{
"name": "Step",
"value": "1"
},
{
"name": "Disabled",
"value": "disabled"
},
{
"name": "Font",
"value": "font"
}
]
}
]
},
{
"Name": "typeofrods",
"Type": "Panel",
"Expanded": "false",
"Properties": [
{
"name": "Background",
"value": "\"LightGray\""
},
{
"name": "Width",
"value": "\"25%\""
},
{
"name": "Font",
"value": "font"
},
{
"name": "Display",
"value": "\"none\""
}
],
"Children": [
{
"Name": "rodText2",
"Type": "Label",
"Properties": [
{
"name": "TextAlign",
"value": "\"center\""
},
{
"name": "Text",
"value": "\"material of rod: \""
},
{
"name": "Font",
"value": "font"
}
]
},
{
"Name": "comboBox",
"Type": "ComboBox",
"Properties": [
{
"name": "Options",
"value": "[\"iron\",\"plastic\"]"
},
{
"name": "OnChange",
"value": "var opts = _view.comboBox.getProperty(\"SelectedOptions\"); // array of options\n var option = (opts.length > 0)? opts[0]:\"\"; // selected option \n\nif (option==\"iron\"){\n material=1;\n }\nelse if (option==\"plastic\"){\n material=2;\n }\n \n"
},
{
"name": "Disabled",
"value": "disabled"
},
{
"name": "Width",
"value": "\"8vw\""
},
{
"name": "Font",
"value": "font"
}
]
},
{
"Name": "typeofrodssize",
"Type": "Panel",
"Expanded": "false",
"Properties": [],
"Children": [
{
"Name": "SizeRod",
"Type": "Label",
"Properties": [
{
"name": "Text",
"value": "\"Size of rod:\""
},
{
"name": "Font",
"value": "font"
}
]
},
{
"Name": "comboBox2",
"Type": "ComboBox",
"Properties": [
{
"name": "Options",
"value": "[\"large\",\"small\"]"
},
{
"name": "OnChange",
"value": "var opts = _view.comboBox2.getProperty(\"SelectedOptions\"); // array of options\n var option = (opts.length > 0)? opts[0]:\"\"; // selected option \n\nif (option==\"small\"){\n xSizeIron=1;\nxSizePla=1; //size of plastic\nsizeL=false; //whether size is large\nxSizeCoil=-1.25;\nxCoil=0.6;\nsizeRes=0.5;\n }\nelse if (option==\"large\"){\n xSizeIron=1.75;\nxSizePla=1.75; //size of plastic\nsizeL=true; //whether size is large\nxSizeCoil=-2;\nxCoil=1;\nsizeRes=1;\n }\n \n"
},
{
"name": "Disabled",
"value": "disabled"
},
{
"name": "Width",
"value": "\"8vw\""
},
{
"name": "Font",
"value": "font"
}
]
},
{
"Name": "small",
"Type": "RadioButton",
"Properties": [
{
"name": "Text",
"value": "\"Small\""
},
{
"name": "Disabled",
"value": "disabled"
},
{
"name": "OnCheckOn",
"value": "xSizeIron=1;\nxSizePla=1; //size of plastic\nsizeL=false; //whether size is large\nxSizeCoil=-1.25;\nxCoil=0.6;\nsizeRes=0.5;"
},
{
"name": "Display",
"value": "\"none\""
}
]
},
{
"Name": "large",
"Type": "RadioButton",
"Properties": [
{
"name": "Checked",
"value": "true"
},
{
"name": "Text",
"value": "\"Large\""
},
{
"name": "Disabled",
"value": "disabled"
},
{
"name": "OnCheckOn",
"value": "xSizeIron=1.75;\nxSizePla=1.75; //size of plastic\nsizeL=true; //whether size is large\nxSizeCoil=-2;\nxCoil=1;\nsizeRes=1;"
},
{
"name": "Display",
"value": "\"none\""
}
]
}
]
}
]
},
{
"Name": "battery",
"Type": "Panel",
"Expanded": "true",
"Properties": [
{
"name": "Background",
"value": "\"rgba(0,254,0,1.0)\""
},
{
"name": "Width",
"value": "\"50%\""
},
{
"name": "Font",
"value": "font"
},
{
"name": "Display",
"value": "\"inline-block\""
}
],
"Children": [
{
"Name": "battText",
"Type": "Label",
"Properties": [
{
"name": "Text",
"value": "\"no. of batteries= \"+ _view._format(battNo,\"0\")"
},
{
"name": "Font",
"value": "font"
}
]
},
{
"Name": "slider",
"Type": "Slider",
"Properties": [
{
"name": "Minimum",
"value": "1"
},
{
"name": "Maximum",
"value": "5"
},
{
"name": "Value",
"value": "battNo"
},
{
"name": "OnChange",
"value": "/*if (battDef==true){\n voltage=2*battNo;\n }\nelse if (battDef==false){\n voltage=0.5*battNo;\n }\n*/"
},
{
"name": "Step",
"value": "1"
},
{
"name": "Disabled",
"value": "disabled"
},
{
"name": "Font",
"value": "font"
}
]
}
]
},
{
"Name": "panel3",
"Type": "Panel",
"Expanded": "false",
"Properties": [
{
"name": "Width",
"value": "\"25%\""
},
{
"name": "Display",
"value": "\"none\""
}
],
"Children": [
{
"Name": "battLevel",
"Type": "CheckBox",
"Properties": [
{
"name": "OnCheckOff",
"value": "battDef=true;\nbattNo=1;\nvoltage=2;\n\n"
},
{
"name": "Text",
"value": "\"Low Battery\""
},
{
"name": "OnCheckOn",
"value": "battDef=false;\nvoltage=0.5;\nbattNo=1;\n"
},
{
"name": "Font",
"value": "font"
},
{
"name": "Display",
"value": "\"none\""
}
]
},
{
"Name": "battLevel2",
"Type": "Label",
"Properties": [
{
"name": "Text",
"value": "\"Battery level: \""
},
{
"name": "Font",
"value": "font"
}
]
},
{
"Name": "comboBox3",
"Type": "ComboBox",
"Properties": [
{
"name": "Options",
"value": "[\"Full\",\"Low\"]"
},
{
"name": "OnChange",
"value": "var opts = _view.comboBox3.getProperty(\"SelectedOptions\"); // array of options\n var option = (opts.length > 0)? opts[0]:\"\"; // selected option \n\nif (option==\"Full\"){\nbattDef=true;\nbattNo=1;\nvolt=2;\n }\nelse if (option==\"Low\"){\n battDef=false;\nbattNo=1;\nvolt=0.5;\n }\n \n"
},
{
"name": "Disabled",
"value": "disabled"
},
{
"name": "Width",
"value": "\"8vw\""
},
{
"name": "Font",
"value": "font"
}
]
},
{
"Name": "lowBatt2",
"Type": "RadioButton",
"Properties": [
{
"name": "Text",
"value": "\"Low\""
},
{
"name": "Disabled",
"value": "disabled"
},
{
"name": "Font",
"value": "font"
},
{
"name": "OnCheckOn",
"value": "battDef=false;\nbattNo=1;\nvolt=0.5;"
},
{
"name": "Display",
"value": "\"none\""
}
]
},
{
"Name": "fullBatt2",
"Type": "RadioButton",
"Properties": [
{
"name": "Checked",
"value": "true"
},
{
"name": "Text",
"value": "\"Full\""
},
{
"name": "Disabled",
"value": "disabled"
},
{
"name": "OnCheckOn",
"value": "battDef=true;\nbattNo=1;\nvolt=2;"
},
{
"name": "Display",
"value": "\"none\""
}
]
}
]
}
]
},
{
"Name": "controlPanel",
"Type": "Panel",
"Expanded": "true",
"Properties": [
{
"name": "Width",
"value": "\"100%\""
},
{
"name": "Display",
"value": "\"inline-flex\""
}
],
"Children": [
{
"Name": "playPauseButton2",
"Type": "TwoStateButton",
"Properties": [
{
"name": "OffClick",
"value": "_pause();\n//speech (\"paused\");\nopen=true;\n"
},
{
"name": "TextOn",
"value": "\"Play \u25b6\""
},
{
"name": "State",
"value": "_isPaused"
},
{
"name": "Tooltip",
"value": "\"Play/Pause\""
},
{
"name": "TextOff",
"value": "\"Pause \u275a\u275a\""
},
{
"name": "Disabled",
"value": "disabled"
},
{
"name": "Width",
"value": "\"25%\""
},
{
"name": "OnClick",
"value": "_play();\n//speech (\"play\");\nopen=false;\n"
},
{
"name": "Font",
"value": "font"
}
]
},
{
"Name": "resetButton3",
"Type": "Button",
"Properties": [
{
"name": "Text",
"value": "\"Reset Setup \u21bb\""
},
{
"name": "Width",
"value": "\"25%\""
},
{
"name": "OnClick",
"value": "_reset();\ncomboxSetCorrectly ()\n//speechzh (\"\u4f60\u597d\");\n"
},
{
"name": "Font",
"value": "font"
}
]
},
{
"Name": "resettable",
"Type": "Button",
"Properties": [
{
"name": "Text",
"value": "\"Reset Table \u21bb\""
},
{
"name": "OnPress",
"value": "ppclog = \"\";\nbattlog = \"\";\ncoillog = \"\";\nmatlog = \"\";\nsizelog = \"\";\n"
},
{
"name": "Width",
"value": "\"25%\""
},
{
"name": "Font",
"value": "font"
},
{
"name": "Display",
"value": "enableTable==true? \"inline-block\":\"none\""
}
]
},
{
"Name": "enabletable",
"Type": "CheckBox",
"Properties": [
{
"name": "Checked",
"value": "enableTable"
},
{
"name": "OnCheckOff",
"value": "enableTable=false;\nWidth1=\"100%\";\nWidth2=\"0%\";\n"
},
{
"name": "Text",
"value": "\"Enable Data Logger\""
},
{
"name": "Width",
"value": "\"25%\""
},
{
"name": "OnCheckOn",
"value": "enableTable=true;\nWidth1=\"70%\";\nWidth2=\"30%\";"
}
]
},
{
"Name": "stepButton2",
"Type": "Button",
"Properties": [
{
"name": "Text",
"value": "\"|\u25ba\""
},
{
"name": "OnClick",
"value": "_step()"
},
{
"name": "Font",
"value": "font"
},
{
"name": "Display",
"value": "\"none\""
}
]
}
]
}
]
},
{
"Name": "panel2",
"Type": "Panel",
"Expanded": "true",
"Properties": [],
"Children": [
{
"Name": "plottingPanel",
"Type": "PlottingPanel",
"Expanded": "false",
"Properties": [
{
"name": "Gutters",
"value": "[0,0,0,0]"
},
{
"name": "ShowAreaRectangle",
"value": "false"
},
{
"name": "YScalePrecision",
"value": "0"
},
{
"name": "XFixedTick",
"value": "0"
},
{
"name": "OnDoubleClick",
"value": "toggleFullScreen();"
},
{
"name": "AxisXShow",
"value": "false"
},
{
"name": "YFixedTick",
"value": "0"
},
{
"name": "TRMessage",
"value": "hintt"
},
{
"name": "XTickStep",
"value": "1"
},
{
"name": "YTickStep",
"value": "1"
},
{
"name": "XAutoTicks",
"value": "false"
},
{
"name": "Height",
"value": "%changeOrientation()%"
},
{
"name": "OnPress",
"value": "var position = _view.plottingPanel.getInteraction().getInteractionPoint();\n"
},
{
"name": "GridXShow",
"value": "false"
},
{
"name": "Width",
"value": "Width1"
},
{
"name": "TLMessage",
"value": "hint"
},
{
"name": "Enabled",
"value": "true"
},
{
"name": "SquareAspect",
"value": "true"
},
{
"name": "MaximumY",
"value": "10"
},
{
"name": "MaximumX",
"value": "scaleX2"
},
{
"name": "YAutoTicks",
"value": "false"
},
{
"name": "GridYShow",
"value": "false"
},
{
"name": "MinimumX",
"value": "scaleX1"
},
{
"name": "MinimumY",
"value": "-10"
},
{
"name": "AxisYShow",
"value": "false"
},
{
"name": "AutoScaleY",
"value": "false"
},
{
"name": "AutoScaleX",
"value": "false"
},
{
"name": "Visibility",
"value": "world===true"
},
{
"name": "XScalePrecision",
"value": "0"
},
{
"name": "Display",
"value": "\"inline-block\""
}
],
"Children": [
{
"Name": "labels",
"Type": "Group2D",
"Expanded": "false",
"Properties": [],
"Children": [
{
"Name": "battArrow",
"Type": "Segment2D",
"Properties": [
{
"name": "SizeX",
"value": "1"
},
{
"name": "X",
"value": "0"
},
{
"name": "LineColor",
"value": "\"rgb(248,140,123,1.0)\""
},
{
"name": "Y",
"value": "7"
},
{
"name": "SizeY",
"value": "-1"
},
{
"name": "LineWidth",
"value": "1"
}
]
},
{
"Name": "battText2",
"Type": "Text2D",
"Properties": [
{
"name": "FillColor",
"value": "\"rgb(248,140,123,1.0)\""
},
{
"name": "X",
"value": "1.7"
},
{
"name": "Y",
"value": "5.5"
},
{
"name": "Text",
"value": "\"battery\""
},
{
"name": "Font",
"value": "\"normal normal 25px \\\"Comic Sans MS\\\", cursive, sans-serif\""
}
]
},
{
"Name": "switchArrow2",
"Type": "Segment2D",
"Properties": [
{
"name": "SizeX",
"value": "2"
},
{
"name": "X",
"value": "11.5"
},
{
"name": "LineColor",
"value": "\"rgb(248,140,123,1.0)\""
},
{
"name": "Y",
"value": "4"
},
{
"name": "Visibility",
"value": "open==false"
},
{
"name": "SizeY",
"value": "2"
},
{
"name": "LineWidth",
"value": "1"
}
]
},
{
"Name": "switchArrow",
"Type": "Segment2D",
"Properties": [
{
"name": "SizeX",
"value": "1.5"
},
{
"name": "X",
"value": "12"
},
{
"name": "LineColor",
"value": "\"rgb(248,140,123,1.0)\""
},
{
"name": "Y",
"value": "4"
},
{
"name": "Visibility",
"value": "open==true"
},
{
"name": "SizeY",
"value": "2"
},
{
"name": "LineWidth",
"value": "1"
}
]
},
{
"Name": "switchText",
"Type": "Text2D",
"Properties": [
{
"name": "FillColor",
"value": "\"rgb(248,140,123,1.0)\""
},
{
"name": "X",
"value": "13.5"
},
{
"name": "Y",
"value": "6.25"
},
{
"name": "Text",
"value": "\"switch\""
},
{
"name": "Font",
"value": "\"normal normal 23px \\\"Comic Sans MS\\\", cursive, sans-serif\""
}
]
},
{
"Name": "rodArrow2",
"Type": "Segment2D",
"Properties": [
{
"name": "SizeX",
"value": "5"
},
{
"name": "X",
"value": "xPlastic"
},
{
"name": "LineColor",
"value": "\"rgb(248,140,123,1.0)\""
},
{
"name": "Y",
"value": "yPlastic+ySizePla/2"
},
{
"name": "Visibility",
"value": "material==2"
},
{
"name": "SizeY",
"value": "0"
},
{
"name": "LineWidth",
"value": "1"
},
{
"name": "Offset",
"value": "\"SOUTH_WEST\""
}
]
},
{
"Name": "rodArrow",
"Type": "Segment2D",
"Properties": [
{
"name": "SizeX",
"value": "5"
},
{
"name": "X",
"value": "xIron"
},
{
"name": "LineColor",
"value": "\"rgb(248,140,123,1.0)\""
},
{
"name": "Y",
"value": "yIron+ySizeIron/2"
},
{
"name": "Visibility",
"value": "material==1"
},
{
"name": "SizeY",
"value": "0"
},
{
"name": "LineWidth",
"value": "1"
},
{
"name": "Offset",
"value": "\"SOUTH_WEST\""
}
]
},
{
"Name": "paperArrow",
"Type": "Segment2D",
"Properties": [
{
"name": "SizeX",
"value": "3"
},
{
"name": "X",
"value": "1"
},
{
"name": "LineColor",
"value": "\"rgb(248,140,123,1.0)\""
},
{
"name": "Y",
"value": "-9"
},
{
"name": "SizeY",
"value": "1"
},
{
"name": "LineWidth",
"value": "1"
}
]
},
{
"Name": "paperText",
"Type": "Text2D",
"Properties": [
{
"name": "FillColor",
"value": "\"rgb(248,140,123,1.0)\""
},
{
"name": "RelativePosition",
"value": "\"WEST\""
},
{
"name": "X",
"value": "4.25"
},
{
"name": "Y",
"value": "-7.75"
},
{
"name": "Text",
"value": "\"paper clips (copper/steel)\""
},
{
"name": "Font",
"value": "\"normal normal 25px \\\"Comic Sans MS\\\", cursive, sans-serif\""
}
]
},
{
"Name": "noPaperclip",
"Type": "Text2D",
"Properties": [
{
"name": "RelativePosition",
"value": "\"CENTERED\""
},
{
"name": "X",
"value": "-16.5"
},
{
"name": "Y",
"value": "0"
},
{
"name": "Text",
"value": "\"no. of paper clips \\n attracted = \"+ paperclipno"
},
{
"name": "Visibility",
"value": "false"
},
{
"name": "Font",
"value": "\"normal normal 2vw \\\"Comic Sans MS\\\", cursive, sans-serif\""
}
]
}
]
},
{
"Name": "electromagnet",
"Type": "Group2D",
"Expanded": "true",
"Properties": [],
"Children": [
{
"Name": "wires1",
"Type": "Group2D",
"Expanded": "false",
"Properties": [
{
"name": "Visibility",
"value": "material==1"
}
],
"Children": [
{
"Name": "right_wire",
"Type": "Polygon2D",
"Properties": [
{
"name": "Points",
"value": "[[11,3.5],[10,3.5],[10,1],[xIron+xSizeIron/2,yIron+5.5]]"
},
{
"name": "LineColor",
"value": "\"Black\""
},
{
"name": "LineWidth",
"value": "3"
}
]
},
{
"Name": "left_wire",
"Type": "Polygon2D",
"Properties": [
{
"name": "Points",
"value": "[[10.5,6],[10,6],[10,8],[-10,8],[-10,1.5],[-5.5,1.5],[-5.5,-5],[xIron-xSizeIron/2,yIron+0.7]]"
},
{
"name": "LineColor",
"value": "\"Black\""
},
{
"name": "LineWidth",
"value": "3"
}
]
}
]
},
{
"Name": "wires2",
"Type": "Group2D",
"Expanded": "false",
"Properties": [
{
"name": "Visibility",
"value": "material==2"
}
],
"Children": [
{
"Name": "right_wire2",
"Type": "Polygon2D",
"Properties": [
{
"name": "Points",
"value": "[[11,3.5],[10,3.5],[10,1],[xPlastic+xSizePla/2,yPlastic+5.5]]"
},
{
"name": "LineColor",
"value": "\"Black\""
},
{
"name": "LineWidth",
"value": "3"
}
]
},
{
"Name": "left_wire2",
"Type": "Polygon2D",
"Properties": [
{
"name": "Points",
"value": "[[10.5,6],[10,6],[10,8],[-10,8],[-10,1.5],[-5.5,1.5],[-5.5,-5],[xPlastic-xSizePla/2,yPlastic+0.7]]"
},
{
"name": "LineColor",
"value": "\"Black\""
},
{
"name": "LineWidth",
"value": "3"
}
]
}
]
},
{
"Name": "rods",
"Type": "Group2D",
"Expanded": "true",
"Properties": [],
"Children": [
{
"Name": "plastic",
"Type": "Group2D",
"Expanded": "false",
"Properties": [
{
"name": "Visibility",
"value": "material==2"
}
],
"Children": [
{
"Name": "plasticRod",
"Type": "Shape2D",
"Properties": [
{
"name": "FillColor",
"value": "\"rgba(128,230,255,1)\""
},
{
"name": "RelativePosition",
"value": "\"SOUTH\""
},
{
"name": "ShapeType",
"value": "\"RECTANGLE\""
},
{
"name": "OnDrag",
"value": "if (yPlastic<=-10){\n yPlastic=-10;\n }\n"
},
{
"name": "OnRelease",
"value": "if (captured==false && open==false){\n loginfo=loginfo + \"\\n\" + paperclipno + \"\\n\" + \"\\n\" +battNo + \"\\n\" +coilNo + \"\\n\" +materialType(material) + \"\\n\" +sizeType(sizeL);\n ppclog = ppclog + \"\\n\" + paperclipno;\n battlog = battlog + \"\\n\" + battNo + battType(battDef);\n coillog = coillog + \"\\n\" + coilNo;\n matlog = matlog + \"\\n\" + materialType(material);\n sizelog = sizelog + \"\\n\" + sizeType(sizeL);\n captured=true;\n}\n"
},
{
"name": "Sensitivity",
"value": "0"
},
{
"name": "SizeX",
"value": "xSizePla"
},
{
"name": "X",
"value": "xPlastic"
},
{
"name": "LineColor",
"value": "\"black\""
},
{
"name": "Y",
"value": "yPlastic"
},
{
"name": "OnPress",
"value": "_play();\n//speech (\"play\");\nopen=false;"
},
{
"name": "SizeY",
"value": "ySizePla"
},
{
"name": "LineWidth",
"value": "1.5"
},
{
"name": "EnabledPosition",
"value": "\"ENABLED_Y\""
}
]
},
{
"Name": "rodText3",
"Type": "Text2D",
"Properties": [
{
"name": "FillColor",
"value": "\"rgb(248,140,123,1.0)\""
},
{
"name": "X",
"value": "xPlastic+8"
},
{
"name": "Y",
"value": "yPlastic+ySizePla/2"
},
{
"name": "Text",
"value": "\"plastic rod\""
},
{
"name": "Font",
"value": "\"normal normal 25px \\\"Comic Sans MS\\\", cursive, sans-serif\""
}
]
}
]
},
{
"Name": "iron",
"Type": "Group2D",
"Expanded": "true",
"Properties": [
{
"name": "Visibility",
"value": "material==1"
}
],
"Children": [
{
"Name": "ironRodL",
"Type": "Shape2D",
"Properties": [
{
"name": "FillColor",
"value": "\"white\""
},
{
"name": "SizeX",
"value": "-0.75"
},
{
"name": "ShapeType",
"value": "\"RECTANGLE\""
},
{
"name": "X",
"value": "-1.5"
},
{
"name": "LineColor",
"value": "\"black\""
},
{
"name": "Y",
"value": "-2"
},
{
"name": "Visibility",
"value": "false"
},
{
"name": "SizeY",
"value": "7"
},
{
"name": "LineWidth",
"value": "3"
}
]
},
{
"Name": "imageIron",
"Type": "Image2D",
"Properties": [
{
"name": "OnRelease",
"value": "if (captured==false && open==false){\n loginfo=loginfo + \"\\n\" + paperclipno + \"\\n\" + \"\\n\" +battNo + \"\\n\" +coilNo + \"\\n\" +materialType(material) + \"\\n\" +sizeType(sizeL);\n ppclog = ppclog + \"\\n\" + paperclipno;\n battlog = battlog + \"\\n\" + battNo + battType(battDef);\n coillog = coillog + \"\\n\" + coilNo;\n matlog = matlog + \"\\n\" + materialType(material);\n sizelog = sizelog + \"\\n\" + sizeType(sizeL);\n captured=true;\n}\n"
},
{
"name": "Sensitivity",
"value": "0"
},
{
"name": "SizeX",
"value": "xSizeIron"
},
{
"name": "RelativePosition",
"value": "\"SOUTH\""
},
{
"name": "X",
"value": "xIron"
},
{
"name": "ImageUrl",
"value": "\"./EMStrength/102950672-iron-texture-pattern-the-metal-plate-with-scuffed.jpg\""
},
{
"name": "Y",
"value": "yIron"
},
{
"name": "Visibility",
"value": "material==1"
},
{
"name": "OnPress",
"value": "_play();\n//speech (\"play\");\nopen=false;"
},
{
"name": "SizeY",
"value": "ySizeIron"
},
{
"name": "EnabledPosition",
"value": "\"ENABLED_Y\""
},
{
"name": "OnDrag",
"value": "// Ensure yIron does not go below the container's top edge (Y = -10)\nyIron = Math.max(yIron, -10);\n\nif (open==false && voltage >=1.6){\n if (yIron <=-10+dy[0]){ // Condition for initial pickup, using dy[0] as a reference height\n // Pickup logic\n var numAttracted = magnetism() + 1;\n for (var i = 0; i < n; i++) { // Iterate through all possible paperclips (n is total number of paperclips)\n if (i < numAttracted) {\n // If this paperclip should be attracted\n theta[i] = pi/2; // Set vertical orientation\n if (i === 0) {\n // First paperclip attaches to the rod\n x[i] = xIron + (Math.random() - 0.5) * xSizeIron * 0.5; // Slight random horizontal offset from rod center\n y[i] = yIron - (dy[i] * 0 ); // Position below the rod, adjusted by 0 * height\n } else if (i === 4) { // For the 5th clip (index 4)\n y[i] = y[0]; // Set its y to be the same as the first clip\n\n // Define the horizontal bounds of the iron rod\n var rodLeftEdge = xIron - xSizeIron / 2;\n var rodRightEdge = xIron + xSizeIron / 2;\n var minSeparation = xSizeIron * 0.5; // Minimum horizontal distance from x[0]\n\n do {\n // Generate a random x within the rod's horizontal bounds\n // (Math.random() * range) + min_value\n x[i] = rodLeftEdge + Math.random() * xSizeIron;\n } while (Math.abs(x[i] - x[0]) < minSeparation); // Keep re-randomizing if too close to x[0]\n\n } else {\n // Subsequent paperclips attach to the one above\n x[i] = x[i-1] + (Math.random() - 0.5) * dx[i] * 0.2; // Slight random horizontal offset from previous clip\n y[i] = y[i-1] - (dy[i] * 0.9 * 2); // Position below the previous clip, adjusted by 0.9 * 2 * height\n }\n } else {\n // If this paperclip is not attracted, reset its position to the bottom\n x[i] = linspace(-3,0,n)[i]; // Reset to initial lying down position\n y[i] = linspace(-9.5,-9.5,n)[i]; // Reset to initial lying down position\n theta[i] = 0; // Reset rotation\n }\n }\n pickupstate = true;\n }\n\n // Move up with clips and bar\n if (yIron > y[0] - dy[0] && pickupstate == true){\n var numAttracted = magnetism() + 1;\n for (var i = 0; i < numAttracted; i++) {\n if (i === 0) {\n y[i] = yIron - (dy[i] * 0.9 ); // First paperclip follows the rod, adjusted by 0.9 * height\n } else if (i === 4) { // For the 5th clip (index 4)\n y[i] = y[0]; // Maintain y same as first clip\n // x[i] will retain its value from the pickup logic, no change needed here\n } else {\n y[i] = y[i-1] - (dy[i] * 0.9 *2); // Subsequent paperclips follow the one above, adjusted by 0.9 * height\n }\n }\n }\n}\n\nif(yIron > -2){ // Keep this line to prevent dragging too far up\n yIron=-2;\n}"
}
]
},
{
"Name": "rodText",
"Type": "Text2D",
"Properties": [
{
"name": "FillColor",
"value": "\"rgb(248,140,123,1.0)\""
},
{
"name": "X",
"value": "xIron+7"
},
{
"name": "Y",
"value": "yIron+ySizeIron/2"
},
{
"name": "Text",
"value": "\"iron rod\""
},
{
"name": "Font",
"value": "\"normal normal 25px \\\"Comic Sans MS\\\", cursive, sans-serif\""
}
]
}
]
},
{
"Name": "groupfollowdrag",
"Type": "Group2D",
"Expanded": "true",
"Properties": [
{
"name": "X",
"value": "xIron"
},
{
"name": "Y",
"value": "yIron"
},
{
"name": "Visibility",
"value": "material==1"
}
],
"Children": [
{
"Name": "displacey",
"Type": "Group2D",
"Expanded": "true",
"Properties": [
{
"name": "Y",
"value": "5"
}
],
"Children": [
{
"Name": "coils",
"Type": "SegmentSet2D",
"Properties": [
{
"name": "NumberOfElements",
"value": "coilNo"
},
{
"name": "Sensitivity",
"value": "0"
},
{
"name": "MovesGroup",
"value": "true"
},
{
"name": "SizeX",
"value": "xSizeCoil"
},
{
"name": "X",
"value": "xCoil"
},
{
"name": "Y",
"value": "yCoil"
},
{
"name": "SizeY",
"value": "0.25"
},
{
"name": "LineWidth",
"value": "3"
}
]
}
]
}
]
},
{
"Name": "groupfollowdrag2",
"Type": "Group2D",
"Expanded": "true",
"Properties": [
{
"name": "X",
"value": "xPlastic"
},
{
"name": "Y",
"value": "yPlastic"
},
{
"name": "Visibility",
"value": "material==2"
}
],
"Children": [
{
"Name": "displacey2",
"Type": "Group2D",
"Expanded": "true",
"Properties": [
{
"name": "Y",
"value": "5"
}
],
"Children": [
{
"Name": "coils4",
"Type": "SegmentSet2D",
"Properties": [
{
"name": "NumberOfElements",
"value": "coilNo"
},
{
"name": "Sensitivity",
"value": "0"
},
{
"name": "MovesGroup",
"value": "true"
},
{
"name": "SizeX",
"value": "xSizeCoil"
},
{
"name": "X",
"value": "xCoil"
},
{
"name": "Y",
"value": "yCoil"
},
{
"name": "SizeY",
"value": "0.25"
},
{
"name": "LineWidth",
"value": "3"
}
]
}
]
}
]
},
{
"Name": "drag_unicode_symbol",
"Type": "Text2D",
"Properties": [
{
"name": "FontSize",
"value": "\"3vw\""
},
{
"name": "RelativePosition",
"value": "\"WEST\""
},
{
"name": "X",
"value": "xIron"
},
{
"name": "Y",
"value": "yIron+ySizeIron/2"
},
{
"name": "Text",
"value": "\"\ud83e\udd0f\""
}
]
}
]
},
{
"Name": "switch",
"Type": "Group2D",
"Expanded": "true",
"Properties": [],
"Children": [
{
"Name": "press",
"Type": "Shape2D",
"Properties": [
{
"name": "OnRelease",
"value": "open=true;"
},
{
"name": "FillColor",
"value": "\"white\""
},
{
"name": "Sensitivity",
"value": "0"
},
{
"name": "SizeX",
"value": "2"
},
{
"name": "ShapeType",
"value": "\"RECTANGLE\""
},
{
"name": "X",
"value": "10"
},
{
"name": "LineColor",
"value": "\"black\""
},
{
"name": "Y",
"value": "4"
},
{
"name": "OnPress",
"value": "open=false;"
},
{
"name": "Visibility",
"value": "false"
},
{
"name": "SizeY",
"value": "2"
},
{
"name": "EnabledPosition",
"value": "\"ENABLED_NONE\""
}
]
},
{
"Name": "top",
"Type": "Shape2D",
"Properties": [
{
"name": "FillColor",
"value": "\"black\""
},
{
"name": "SizeX",
"value": "1"
},
{
"name": "ShapeType",
"value": "\"ELLIPSE\""
},
{
"name": "X",
"value": "10"
},
{
"name": "Y",
"value": "5"
},
{
"name": "Visibility",
"value": "false"
},
{
"name": "SizeY",
"value": "1"
}
]
},
{
"Name": "bottom",
"Type": "Shape2D",
"Properties": [
{
"name": "FillColor",
"value": "\"black\""
},
{
"name": "SizeX",
"value": "1"
},
{
"name": "ShapeType",
"value": "\"ELLIPSE\""
},
{
"name": "X",
"value": "10"
},
{
"name": "Y",
"value": "3"
},
{
"name": "Visibility",
"value": "false"
},
{
"name": "SizeY",
"value": "1"
}
]
},
{
"Name": "open",
"Type": "Segment2D",
"Properties": [
{
"name": "SizeX",
"value": "1"
},
{
"name": "X",
"value": "10"
},
{
"name": "Y",
"value": "5"
},
{
"name": "Visibility",
"value": "false"
},
{
"name": "SizeY",
"value": "-2"
},
{
"name": "LineWidth",
"value": "3"
}
]
},
{
"Name": "close",
"Type": "Segment2D",
"Properties": [
{
"name": "SizeX",
"value": "0"
},
{
"name": "X",
"value": "10"
},
{
"name": "Y",
"value": "5"
},
{
"name": "Visibility",
"value": "false"
},
{
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\nExplore how varying different parameters affects the strength of an electromagnet. This simulation is designed to provide hands-on experience with electromagnetic principles, enabling learners to understand and visualize the impact of each variable on magnet strength.
\nDescription
\nThis interactive simulation allows users to experiment with a rod that attracts paper clips. Set within a controlled environment, the simulation features a rod suspended above a mix of copper and steel paper clips. At the start, the switch is open with only one battery connected, energizing the large iron rod.
\nUsers can manipulate the rod\u2019s position to optimize the magnetic effect on the paper clips below. Additionally, the data logger function captures and displays the effects of different settings, offering a practical insight into electromagnetic theory.
\nControllable Variables:
\n\n - Number of Coils: Increase or decrease the coils around the rod to determine their effect on the magnet\u2019s strength.
\n Rod Material: Choose between iron and plastic to observe how material influences magnetic capability.Rod Size: Toggle between small and large to explore how size impacts magnetic field strength.- Number of Batteries: Adjust the count from 1 to 5 to see how battery strength affects magnetism.
\n Battery Power: Modify from low to full to test how power levels affect the magnetic force.- Circuit Switch: Operate as a closed or open circuit to engage or disengage the magnetic field.
\n
\nControls
\n\n - Play/Pause Button: This control toggles the switch, activating or deactivating the circuit and thus the electromagnetic effect.
\n - Reset Setup Button: Resets all variables to their default settings, allowing for a fresh start with each experiment.
\n - Reset Data Button: Clears all data collected in the data logger, preparing the tool for new data capture without previous influence.
\n
\nThis simulation provides an excellent platform for students to engage in active learning about electromagnetism, offering a clear visualization of theoretical concepts through practical application.
\n\n\nOther Resources
\n"
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