For the circuits shown in figures I and II, the voltmeter reading would be
A
2V in circuit I and 0V in circuit II
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B
0V in both circuits
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C
2V in both circuits
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D
0V in circuit I and 2V in circuit II
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Solution
The correct option is D0V in circuit I and 2V in circuit II In the circuit I, the key is open so current in the circuit is zero. Therefore the voltmeter gives 0V reading.
In the circuit II, if we take ammeter as an ideal ammeter then we can see voltmeter and battery are connected in parallel so reading of voltmeter is equal to the voltage of battery i.e. reading of the voltmeter is 2V.