Potentiometer is a better instrument for measuring EMF as compared to voltmeter because
[0.77 Mark]
A
It is cheap
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B
It draws maximum current from the cell
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C
It is sturdy
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D
It is based on null deflection method
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Solution
The correct option is D It is based on null deflection method
A potentiometer draws no current from the battery or main circuit at the balance point, and thus it’s a better and more accurate instrument than a voltmeter.