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8. A long solenoid of radius a with n turns per unit length is carrying a time-dependent current
I(t) = I, sin(ot), where I, and o are constants. The solenoid is surrounded by a wire of resistance R that has
two circular loops of radius b with b>a (see the figure). Find the magnitude of current induced in the outer
loops at time t= 0.
a
b

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