Wh is the use of potentiometer prefferd over that of voltmetre for measurement of emf?

Asked by padmini kommu | 24th Feb, 2011, 04:59: PM

Expert Answer:

Dear student
A potentiometer is preferred for the measurement of p.d. because in the position of a balance point, no electric current is drawn  by the potentiometer, from the source whose p.d. is to be measured while a voltmeter always draws a little of current. Therefore, we prefer a potentiometer.
Hope this clarifies your doubt.

Answered by  | 24th Feb, 2011, 12:07: PM

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