Question

** E16M.8** Two concentric circular
coils lie on a tabletop. The outer coil has a radius

A)What approximations
do we have to make to calculate the emf and current induced in the
small loop? (*Hint:* Any current flowing in the small loop
will create a magnetic field. Why does this complicate things?)

B)Argue that the induced current in the small loop is 90° out of phase with the current in the large coil.

C)If the current in the large coil is going through zero on the way to becoming clockwise, in what direction does the current in the small loop flow?

D)Calculate the maximum emf and the maximum current flowing in the small loop.

E)Argue on the basis of this answer that one of the approximations you made in part (a) is valid.

Answer #1

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