13.6 Exercise 3

A 50-turn rectangular coil with dimensions $0.15 \text{m} \times 0.40 \text{m}$ rotates in a uniform magnetic field of magnitude 0.75 T at 3600 rev/min. (a) Determine the emf induced in the coil as a function of time. (b) If the coil is connected to a $1000 - \Omega$ resistor, what is the power as a function of time required to keep the coil turning at 3600 rpm? (c) Answer part (b) if the coil is connected to a 2000-$\Omega$ resistor.