A large circular coil of radius a consists of Na loops of wire. A sinusoidal current is driven through the coil, given by L(1) the formula: Ia(t) = 1, cos(awt) Lying at the exact center of the large coil is a very small coil of radius b, with b « a. The small coil consists of Np total loops. Both coils are coplanar. Determine the induced emf (magnitude and direction) in the small coil, in each of the following situations: Ng to AC source (i) At timet = 0, when the current has its maximum clockwise value. (ii) At time t = changing from CCW to CW. 3n/2w, when the current is zero, and |clockwise counterclockwise clockwise current current current

A large circular coil of radius a consists of Na loops of wire. A sinusoidal current is driven through the coil, given by L(1) the formula: Ia(t) = 1, cos(awt) Lying at the exact center of the large coil is a very small coil of radius b, with b « a. The small coil consists of Np total loops. Both coils are coplanar. Determine the induced emf (magnitude and direction) in the small coil, in each of the following situations: Ng to AC source (i) At timet = 0, when the current has its maximum clockwise value. (ii) At time t = changing from CCW to CW. 3n/2w, when the current is zero, and |clockwise counterclockwise clockwise current current current