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An ammeter of resistance 50 Omega reads ...

An ammeter of resistance` 50 Omega` reads 0.5 A, when connected in a circuit. What is the new ammeter reading, if it is shunted by a resistance of` 10Omega`? Assume that the current in the main circuit is unchanged.

A

`1/10A`

B

`1/5A`

C

`1/12A`

D

`1/20A`

Text Solution

Verified by Experts

The correct Answer is:
C
`I_g xx 50 =10[0.5-I_g] 50I_g=5-10I_g 60I_g=5 therefore I_g=1/12A`
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