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Question
Potentionmeter measures the potential difference more accurately than a voltmeter, because the potentionmeter
Potentionmeter measures the potential difference more accurately than a voltmeter, because the potentionmeter
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Solution
The correct option is A Does not draw current from external circuit.
Potentiometer measures the potential difference more accurately than a voltmeter, because the potentionmeter does not draw current from external circuit.
On the other hand a voltmeter draws some current from the cell during measurement. When voltmeter is connected across the cell it amounts to closed circuit measurements and there is inner potential drop due to internal resistance of the cell. Therefore, the measurement of potential difference will not be accurate.
Potentiometer measures the potential difference more accurately than a voltmeter, because the potentionmeter does not draw current from external circuit.
On the other hand a voltmeter draws some current from the cell during measurement. When voltmeter is connected across the cell it amounts to closed circuit measurements and there is inner potential drop due to internal resistance of the cell. Therefore, the measurement of potential difference will not be accurate.
On the other hand a voltmeter draws some current from the cell during measurement. When voltmeter is connected across the cell it amounts to closed circuit measurements and there is inner potential drop due to internal resistance of the cell. Therefore, the measurement of potential difference will not be accurate.
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