1. For the circuit arrangement specifi ed in Q12 above determine the power and energy dissipated by the external load resistor in 5 minutes.
2. A circuit of resistance 4 Ω dissipates a power of 16 W. Calculate
(a) the current flowing through it,
(b) the p.d. developed across it, and
(c) the charge displaced in a time of 20 minutes.