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The sensitivity of a galvanometer is 60...

The sensitivity of a galvanometer is 60 division /A . When a shunt is used, its sensitivity becomes 10 division/A. If the galvanometer is of resistance `20 Omega `, the value of shunt used is

A

`4Omega`

B

`5Omega`

C

`20Omega`

D

`2Omega`

Text Solution

Verified by Experts

The correct Answer is:
A
In a series L-R circuit , current `i=i_circ (1-e^-tR/L)`
At `t=0, i= 0`
Potential difference across resister = 0V
and potential difference across inductor = 25 V
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