ch32-p038 - 38. An electric field with circular field lines...

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38. An electric field with circular field lines is induced as the magnetic field is turned on. Suppose the magnetic field increases linearly from zero to B in time t . According to Eq. 31-27, the magnitude of the electric field at the orbit is given by E rd B dt rB t = F H G I K J = F H G I K J 22 , where r is the radius of the orbit. The induced electric field is tangent to the orbit and changes the speed of the electron, the change in speed being given by
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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