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An ammeter and a voltmeter are joined in...

An ammeter and a voltmeter are joined in series to a cell. Their readings are A and V, respectively. If a resistnace is now joined in parallel with the voltmeter

A

both A and V will increase

B

both A and V will decrease

C

A will decrease, V will increase

D

A will increase, V will decrease

Text Solution

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The correct Answer is:
D
d. When a resistance is joined in parallel with the voltmeter, the total resistance of the circuit decreases. Current will increase, so ammeter reading will increase. The equivalent resistance across the voltmeter decreases and hence its reading will decrease.
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