By error, a student places moving-coil voltmeter V (nearly ideal) in series with the resistance in a circuit in order to read the current, as shown. The voltmeter reading will be
A
0
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B
4 V
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C
6 V
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D
12 V
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Solution
The correct option is D 12 V As shown in figure, moving-coil voltmeter V (nearly ideal) is placed in series with the resistance in a circuit. Thus it is in parallel to the battery, hence will measure voltage across it i.e. 12V