7. Suppose we equip a wire loop with radius ro with a voltmeter and a resistance Ro embedded for measurement. The loop is fixed in space, and its radius is

constant over time. We provide magneticfield B pot pecessarily constan+ (a) Assume B is a triangular wave, i.e. jerky and unlike a sinusoid. Plot the magnetic flux O of the loop and the emf V across Ro as functions of t. (Two plots) (b) The average B field is zero. Should the power dissipated by the resistor be zero? Justify your answer. (Short answer)