(a) The voltage applied will be equal to the average sum of the instantaneous the voltage across the circuit it's series elements and will be true for any ac circuit. But the voltages across different elements may not be in phase-in the case of rms Voltage In the case of rms voltage, therefore, the statement is not true.

(b) When the circuit is broken, the capacitor is charged with a high induced voltage and the capacitor is used in an induction coil's primary circuit to avoid sparks in the circuit.

(c) For dc signals, an inductor (L) impedance is negligible, but a capacitor
impedance is very high. The dc signal will be appearing across the capacitor (C).In the case of a high-frequency ac signal, an inductor (L) impedance will be high and a capacitor (C) impedance will be very low. A high-frequency ac signal will therefore appear across the inductor (L).

(d) When an iron core is inserted into the choke coil in series with a lamp connected to the ac line, the lamp will glow dimly, and this is because the iron core and the choke coil increase the circuit impedance.

(e) The choke coil reduces the tube voltage without a lot of power being wasted. So, when using fluorescent tubes with ac mains, the choke coil is needed. An ordinary resistor wastes power in the form of heat so that the use of fluorescent tubes with ac mains cannot use an ordinary resistor instead of a choke coil.