Question

`(i)` Identify the part of electronmagnetic spectrum which is :
`(a)` suitable for radar system used in aircraft navigation,
`(b)` Produced by bombarding a metal target by high speed electrons.
`(iii)` Why does galvanometer show a momentary deflection at the time of charging or discharging a capacitor ? Write the necessary expression to explain this observation.

Answer 1

`(i) (a)` Microwaves.
`(b)` X-rays.
`(ii)` During charging of a cpacitor, current flows in the circuit. Conduction current in wire and displacement current between the plates of the capcitor. When capacitor is fully charged both conduction and displacement current becomes zero.
`ointvecB.vecdl=mu_(0)(I+I_(D))`