Question

1. (30 pts) The radius of a perfectly conducting metal loop is r (m), situated in the x-y plane and centered at the z axis, is expanding with a speed of v (m/s) leaving the center of the loop. A break in the loop has a small R (ohm) resistor across it. Meanwhile, there exists a magnetic field B = 2B, T. a. Find Vemf as shown in the figure. b. Calculate the induced current in the loop and indicate the direction of this current. c. Use Lenz's Law to verify the direction of current. Elaborate your reason. OB R + Vemf

Answer 1

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