Physics, asked by naira76, 1 year ago

why is the Potentiometer preferred to a voltmeter for measuring EMF of a cell?

Answers

Answered by Soumyadip45

Answer:

The electromotive force (emf) of a cell is its terminal voltage when no current is flowing through it. The terminal voltage of a cell is the potential difference between its electrodes. A voltmeter cannot be used to measure the emf of a cell because a voltmeter draws some current from the cell.

For this reason potentiometer is used to measure EMF of a cell.

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