Inductance Suppose that a conductor moves through a uniform magnetic field as shown. The magnetic force on the electrons in it is F = qvBsinθ. They pile up at one end until the force from the electric field they create (F = qE) is strong enough to balance the magnetic force. Setting these equal, the charge qcan be canceled out to get E = vB. If we now multiply by the length lof the conductor, we will get the voltage difference between its ends: V = lBv, where the positive end is given by the pushing-palm version of the Right-Hand Rule and theta is the angle between the velocity and magnetic field vectors. This voltage difference is the result of a phenomenon called inductance, and it is often referred to as the EMFor electromotive force(E), though we will continue to call it simply voltage. Now consider a rectangular loop being pushed into a uniform magnetic region. When the front edge enters the field, the moving electrons generate a current in the loop that travels counter-clockwise. This stops as soon as the rear edge is inside
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This note was uploaded on 04/05/2012 for the course PHYS 131 taught by Professor Tibbets during the Spring '11 term at Cuyamaca College.