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A resistance R is to be measured using a...

A resistance R is to be measured using a meter bridge. Student chooses the standard resistance S to be `100 Omega`. He finds the null point at `l_(1)=2.9cm`. He is told to attempt to improve the accuracy. Which of the following is a useful way?

A

He should measure l1 more accurately.

B

He should change S to 1000 Q and repeat the \ experiment.

C

He should change S to 3 Q and repeat the experiment

D

He should give up hope of a more accurate measurement with a meter bridge.

Text Solution

Verified by Experts

The correct Answer is:
C
The balanced points can be obtained only if the potential difference across the wire is greter than the emf's to be compared (or measured).Therefore, option (b) is correct.
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