Atoroidal coil has a rectangular cross section, with inner radius a, outer radius a t w, and height h. it carries a total of n tightly wound turns, and the current is increasing at a constant rate (di/dt = k). 2. (a) in the quasistatic approximation, find the direction and the magnitude of the m field b everywhere (for points inside and outside of the toroidal coil). [6 points) (b) calc ulate the flux of b through the cross section the toroid. (14 points) (c) assume w and h are both much less than a. above the center of the toroid.