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A galvanometer of resistance 36 Omega is...

A galvanometer of resistance `36 Omega` is changed into an ammeter by using a shunt of `4 Omega`. The fraction f of total current passing through the galvanometer is

A

`1//40`

B

`1//4`

C

`1//140`

D

`1//10`

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The correct Answer is:
D
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A galvanometer of resistance 90 Omega is shunted by a resistance of 10 Omega . What fraction of main current passes through the shunt ?

PHYSICS WALLAH-CURRENT ELECTRICITY-Level-2
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