# Question: two concentric circles sitting on the same plane xy plane...

###### Question details

Two concentric circles sitting on the same plane (x-y plane)
have

radius a and b, and number of turns N1 and N2, respectively. If
the

larger coil is carrying current I(t) = I_{0} sin(wt)
determine the

induced emf across the terminal of the smaller coil. Assume
radius

a<<b.