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Magnetic Field from Loops

The EJSMagnetic Field from Loops model computes the B-field created by an electric current through a straight wire, a closed loop, and a solenoid. The user can adjust the vertical position of the slice through the 3D field.

  1. Watch the simulation as the field changes from the field around a long straight current-carrying wire to the field near a coil. Explain what happens to the field. Inside a coil of many loops, why is the field fairly uniform near the center (think about vector addition and what vectors would be adding together near the center).
  2. There is an arrow on each end of the wire (red and blue).  Which one shows the direction of the current in the wire? Explain.
  3. The simulation also shows the magnetic flux. What is flux? Therefore, what do the different colors represent and why (i.e is pink higher flux than yellow or vice versa)? and what does \"higher flux\" mean in terms of the geometry and field strength?)?

Credits:

The Magnetic Field from Loops simulation was created by Fu-Kwun Hwang using the Easy Java Simulations (EJS) modeling tool and was adapted to EJS version 4.1 by Robert Mohr and Wolfgang Christian at Davidson College. Additional exercises written by Anne J. Cox. You can examine and modify the model for this simulation if you have Ejs installed by right-clicking within the simulation frame and selecting \"Open Ejs Model\" from the pop-up menu. Information about EJS is available at: <http://www.um.es/fem/Ejs/> and in the OSP ComPADRE collection <http://www.compadre.org/OSP/>.

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Magnetic Field from Circular Current Loops Simulation

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\n This interactive simulation enables users to explore the magnetic field generated by circular current loops. Adjust parameters such as the number of loops, the current flowing through the loops, and the z-slice to observe how these factors influence the magnetic field's strength and pattern.\n

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Features

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  • Visualize magnetic field lines in 3D and 2D plane slices to analyze their symmetry and distribution.
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  • Adjustable parameters including current, number of loops, z-slice, and magnetic poles (North and South).
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  • Dynamic graph displaying magnetic field strength along the z-plane across the loop.
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  • Interactive controls for hands-on learning and enhanced conceptual understanding of electromagnetism.
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Learning Objectives

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  • Understand the relationship between current, number of loops, and magnetic field strength.
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  • Apply the right-hand grip rule to determine the resulting North and South poles in the magnetic field produced by current loop coils.
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  • Analyze the effects of superposition of magnetic fields from multiple loops on the overall field pattern.
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How to Use

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\n Use the sliders and input fields to modify the simulation parameters. Observe how changes in current, number of loops, and z-slice affect the magnetic field's characteristics. To reset the simulation to default settings, use the reset button. For an entirely fresh start, refresh the browser to clear previously saved values.\n

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Applications

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\n This simulation is an excellent tool for learning the fundamentals of electromagnetism, including concepts such as solenoids, magnetic field patterns, and the Biot-Savart law. It is ideal for students at the secondary or junior college levels studying physics.\n

" } ] } ], "RootProperties": [] }, "metadata": { "APP": "WebEJS", "CreatedWith": "WebEJS : The web version of Easy JavaScript Simulations", "MoreInfo": "WebEJS 1.1", "version": "https://www.um.es/fem/wikis/webejs/" } }