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A potentiometer is an accurate and versa...

A potentiometer is an accurate and versatile device to make electrical measurements of `E.M.F.` because the method involves

A

potential gradients

B

a condition of no current flow through the galvanometer

C

a combination of cells, galvanometer and resistances

D

cells

Text Solution

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The correct Answer is:
B
A potentiometer is an accurate and versatile device to make electrical measurements of emf because the method involves a condition of no current flow through the galvanometer, the device can be used to measure potential difference, internal resistance of a cell and compare emf.s of two sources
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