(a) Give one use of electromagnetic rediations obtained in nuclear disintegrations.
(b) Give one example each to illustrate the situations where there is (i) displacement current but no conduction current and (ii) only conduction current but no displacement current.

Explanation

(a) Gamma Rays , Use : Treatment of cancer tumours.
(b) (i) Displacement current but no conduction current : Displacement current exists whenever there is a change of electric flux since electric charges do not flow through the insulation from one plate of a capacitor to other . So , there is no current inside the capacitor .
(ii) Conduction current but no displacement current : It is a current which arises due to flow of electrons in conductors . When a capacitor is connected to a battery , it starts storing charge due to conduction current . Hence , there is no displacement current in the wires outside the capacitors.