why is potentiometer is preferred as voltmeter..explain..
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Explanation:
While a voltmeter draws a small current from the cell for its operation.So it measures the terminal p.d. in a closed circuit which is less than the emf of a cell.That is why a potentiometer is preferred over a voltmeter for measuring the emf of a cell...
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Answer:
it is more sensitive than voltmeter. it can detect the least possible count in the circuit. it does not draw any current from the source of known e.m.f that is why potentiometer is preferred as voltmeter.
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