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The accurate measurement of emf can be o...

The accurate measurement of emf can be obtained using.

A

multimeter

B

voltmeter

C

voltameter

D

potentiometer

Text Solution

Verified by Experts

The correct Answer is:
D
A potentiometer does not draw any current from the cell whose emf is to be measured, whereas a voltmeter always draws some current. Hence, we can measure the emf of a cell accurately by using a potentiometer.
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Assertion : Electric field outside the conducting wire accurate measurement. Reason : The potential gradient for a potentiometer of accurate measurement. Reason : Net charge on conducting wire is zero.

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