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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 = 2.9 cm`. He is told to attempt to improve the accuracy.Which of the following is a useful way?

A

He should measure` l_1` more accurately.

B

He should change S to `1000 Omega`and repeat the experiment

C

He should change S to`3 Omega`and repeat the experiment

D

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

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