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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A resistance R is to be measured using a meter bridge. Student chooses the standared resistance S to be 100Ω. He finds the null point at l1=2.9cm. He is told to attempt to improve the accuracy. Which of the folllowing is a useful way?

A resistance R is to be measured using a meter bridge. Student chooses the standared resistance S to be 100Ω. He finds the null point at l1=2.9cm. He is told to attempt to improve the accuracy. Which of the folllowing is a useful way?

Two cells of emfs approximately 5 V and 10 V are to be accurately compared using a poteniometer of length 400 cm.