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In the circuit shown in figure, reading ...

In the circuit shown in figure, reading of ammeter will

A

shows no deflection if `S_1` is closed

B

decrease if `S_2` is closed

C

increase if `S_2` is closed

D

decrease if `S_2` is closed

Text Solution

Verified by Experts

The correct Answer is:
C
By closing `S_1` net external resistance wil decrease. So, main current will increase.
By closing `S_2` net emf will remain unchange but net internal resistance will decrease. Hence, main current will increase.
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