<![CDATA[How EMF is produced]]> false false false false false false false true true false ./tansengkwang.png DESCRIPTION_EDITOR Intro Page true false _default_ Intro Page false

How emf is produced can be understood based on the magnetic forces experienced by a charged particle within a conducting wire as it cuts the magnetic field lines.

]]> 20 1 false VARIABLE_EDITOR Var Table true false ODE_EDITOR Evol Page true false t 0.05 v RungeKutta 10000 0.00001 false false false false CODE_EDITOR FixRel Page true false 4.5) {t1=3.5;showforce=false} else {t1=t-1.5;showforce=true}} if(t<2) { showpoles=false} else { if(t>10) {showpoles=false} else {showpoles=true}} if(fieldup=true) { fielddown=false} else {fielddown=true} if(x<0.8){ ye1=0.6; ye2=0.3+0.3*v*t1; ye3=0+v*0.6*t1; ye4=-0.3+0.9*v*t1; ye5=-0.6+1.2*v*t1} else { if (x>1){ye1=0.6; ye2=0.3; ye3=0; ye4=-0.3; ye5=-0.6} else {ye1=0.6; ye2=0.56-0.4*v*(t-7); ye3=0.52-0.8*v*(t-7); ye4=0.48-1.2*v*(t-7); ye5=0.44-1.6*v*(t-7)}} ]]> HTML_VIEW_EDITOR HtmlView Page true false 0 0 0 800 600 true true Elements.Panel true Elements.Panel Elements.Label Electromagnetic forces on electrons within a moving conductor in a B-field"]]> true Elements.WrappedPanel true Elements.DrawingPanel true Elements.Group2D Elements.Text2D Elements.ShapeSet2D Elements.SegmentSet2D Elements.SegmentSet2D Elements.ShapeSet2D false Elements.Group2D Elements.Text2D Elements.Text2D Elements.Arrow2D Elements.Shape2D false Elements.Group2D Elements.Arrow2D Elements.Shape2D Elements.Segment2D false Elements.Group2D Elements.Arrow2D Elements.Shape2D Elements.Segment2D false Elements.Group2D Elements.Arrow2D Elements.Shape2D Elements.Segment2D false Elements.Group2D Elements.Arrow2D Elements.Shape2D Elements.Segment2D false Elements.Group2D Elements.Arrow2D Elements.Shape2D Elements.Segment2D false Elements.Group2D Elements.Segment2D Elements.Segment2D Elements.Segment2D true Elements.Panel true Elements.Panel true Elements.Panel Elements.TwoStateButton Elements.Button Elements.Button Elements.Button Elements.Panel How emf is generated

Consider the electrons within a conductor that is moving at constant speed into a magnetic field. As each electron is moving in a magnetic field, it experiences a magnetic force which pushes it to one end of the conductor. The movement of electrons amount to a generation of e.m.f.

When the conductor leaves the magnetic field, the magnetic force ceases and by mutual repulsion, the electrons become uniformly distributed again and e.m.f. no longer exists.

]]>