Assertion (A): For best results the system of a D'Arsonval galvanometer should be slightly under damped.
Reason (R): Degree of damping affects the time taken by the instrument to come to final position.
Crompton potentiometer has
Measurement of non-electrical quantity involves the following subsystems
If two time varying signals of equal magnitudes and 90° phase displacement are applied to X and Y plates of CRO, the display will be
It is required to measure the true open circuit emf of a battery. The best device is