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- Why is potentiometer preferred to a voltmeter to measure voltage in a circuitOption: 1 Range of voltmeter is small compared to a potentiometer</d
Why is potentiometer preferred to a voltmeter to measure voltage in a circuit
Range of voltmeter is small compared to a potentiometer
No current is drawn by potentiometer during measurement
Potentiometer is cheaper
Potentiometer is hardly compared to a voltmeter to measure voltage in a circuit
Answers (1)
As we learn
To determine the internal resistance of a primary cell using potentiometre -
r = internal resistance
l1, l2 = balancing length
R= external resistance
- wherein
Voltmeter draw some current and hence the measurement is not perfect. Its preferred to use potentiometer over voltmeter.
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