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Simple Circuit

Net resistanc...

Question

Net resistance of a voltmeter should be large enough to ensure that

A

It does not get overheated

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B

It does not draw excessive current

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C

It can measure potential difference

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D

It does not appreciably change the potential difference to be measured.

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Solution

The correct option is C It does not appreciably change the potential difference to be measured.
Resistance of voltmeter is too high, so that it draws negligible current from the circuit. Hence no additional voltage gets dropped in the circuit and thus it does not appreciably change the potential difference to be measured.

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