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A potentiometer experiment is set up to ...

A potentiometer experiment is set up to compare the e.m.f.'s `E_(1) and E_(2)` of two cells. When the null point is obtained, the current is drawn from

A

only the driver cell

B

only the cell of e.m.f. `E_(1)`

C

only the cell of e.m.f. `E_(2)`

D

both the driver cell and the cells of e.m.f.s `E_(1) and E_(2)`

Text Solution

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The correct Answer is:
A
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