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The resistance of a galvanometer is 25 ...

The resistance of a galvanometer is 25 ohm and it requires `50muA` for full deflection. The value of the shunt resistance required to convert it into an ammeter of 5 amp is

A

`2.5 xx 10^(-4) ohm`

B

`1.25 xx 10^(-3)` ohm

C

0.05 ohm

D

2.5 ohm

Text Solution

Verified by Experts

The correct Answer is:
A
`S = (I_(g)/(I - I_(g))R_(g)) = (50 xx 10^(-6))/(5-50 xx 10^(-6)) 25 = 0.25mOmega`
`=2.5 xx 10^(4) Omega`
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