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Sensivitivity of a moving coil galvanom...

Sensivitivity of a moving coil galvanometer can be increased by

A

decreasing the number of turns of coil

B

increasing the number of turns of coil

C

decreasing the area of a coil

D

by using a weak magnet

Text Solution

Verified by Experts

The correct Answer is:
B
Sensitivity of a galvanometer is the deflection produce for a unit current flowing through it i.e
`(phi)/(I) =(NBA)/(C )`
To increase the sensitivity of a galvanometer we should
(i) increase the number of turns (N) of coil
(ii) increases the area of coil (A)
(iii) use a powerful magnet
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