1. An 8µF capacitor is connected through a 1.5 MW resistance to a direct current source. After being on charge for 24 seconds, the capacitor is disconnected and discharged through a resistor. Determine what % age of the energy input from the supply is dissipated in the resistor.
2. An 8µF capacitor is connected in series with a 0.5 MW resistor across a 200V d.c. supply. Calculate (i) the time constant (ii) the initial charging current (iii) the time taken for the p.d. across the capacitor to grow to 160 V and (iv) the current and the p.d. across the capacitor in 4 seconds after it is connected to the supply.