A small coil of 40 turns and a surface area 30 cm^2 has its plane perpendicular to a magnetic field B=0.5T. The coil is connected to a device designed to measure the total charge passing through the circuit.
(a) what is the current induced in the coil if the coil is rotated through 180 degrees in 0.1 seconds?
(b) the resistance of the circuit is 16ohms, how much charge passes through the coil?