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The resistance of a galvanometer coil is...

The resistance of a galvanometer coil is R. What is the shunt resistance required to convert it into an ammeter of range 4 times

A

`R//5`

B

`R//4`

C

`R//3`

D

4R

Text Solution

Verified by Experts

The correct Answer is:
C
`S= (I_(g))/(I-I_(g)) R_(G) =(0.25 I)/(0.75 I) xx R = R/3`
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