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Standard IX

Physics

Equivalent Resistance in Series Circuit

An ammeter an...

Question

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

both A and V will decrease

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both A and V will increase

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A will increase, V will decrease

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A will decrease, V will increase

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Solution

The correct option is C A will increase, V will decrease
When a resistance joined in parallel , the effective resistance of the circuit will reduce.
Thus, current will increase and voltage will decrease being low resistance.

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

The correct option is C A will increase, V will decreaseWhen a resistance joined in parallel , the effective resistance of the circuit will reduce.Thus, current will increase and voltage will decrease being low resistance.

The correct option is C A will increase, V will decrease
When a resistance joined in parallel , the effective resistance of the circuit will reduce.
Thus, current will increase and voltage will decrease being low resistance.