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Q.

The net resistance of a voltmeter should be large to ensure that


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a

It does not get overheated      

b

It can measure large potential differences

c

It does not draw excessive current

d

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

answer is D.

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Detailed Solution

The greater the resistance of the voltmeter, the more accurate it’s reading. A voltmeter is said to be ideal if its resistance is infinite, implying that it draws no current from the circuit element to operate. As a result, the net resistance of a voltmeter should be large to ensure that it does not significantly alter the potential difference to be measured.
 
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