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Question
In order to not change the measured voltage too much, the overall resistance of voltmeter should be
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The correct option is A Extremely high
When a voltmeter is connected in parallel across two points we are interested in, it should be ensured that no current should ideally pass through voltmeter to give precise reading. But due to practical impossibility, it is at least made sure that if not zero then very small current should pass through the voltmeter. Thus a series resistor of very large value is connected in series with the coils of voltmeter.
When a voltmeter is connected in parallel across two points we are interested in, it should be ensured that no current should ideally pass through voltmeter to give precise reading. But due to practical impossibility, it is at least made sure that if not zero then very small current should pass through the voltmeter. Thus a series resistor of very large value is connected in series with the coils of voltmeter.
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