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A moving coil galvanometer gives full sc...

A moving coil galvanometer gives full scale defection when a current of 0.005 A is passed through its coil it is converted in to a voltmeter reading up to 5V by using an external resistance of 975 `Omega` what is the resistance of the galvanometer coil ?

A

`25 Omega`

B

`30 Omega`

C

`40 Omega`

D

`50 Omega`

Text Solution

Verified by Experts

The correct Answer is:
A

`R=(V)/(I_g)-G`
`therefore G=(V)/(I_g)-R=(5)/(0.005)-975=25Omega`.
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