a potentiometer is considered a versatile and accurate device to make | Examsbook

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Q:
A potentiometer is considered a versatile and accurate device to make an electrical measurement of EMF. Why?

1
Because the method involves a combination
2
There are cells involved
3
Because of potential gradients
4
As there is no flow of current through the galvanometer

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Answer : 4. "As there is no flow of current through the galvanometer"
Explanation :
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. Q.

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