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The net resistance of a voltmeter should be large to ensure that |
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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 large potential difference |
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d) |
It does not appreciably change the potential difference to be measured |
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The net resistance of a voltmeter should be large to ensure that |
|
|
a) |
It does not get overheated |
|
b) |
It does not draw excessive current |
|
c) |
It can measure large potential difference |
|
d) |
It does not appreciably change the potential difference to be measured |
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(d) The resistance of voltmeter is too high, so that it draws negligible current from the circuit, hence potential drop in the external circuit is also negligible |