MHT CET Physics question

Accuracy of a metrebridge is maximum when the null point is obtained at the midpoint of the bridge wire. This is because

(A)The error due to non uniformity of diameter of the wire is minimum in that case
(B)The error due to the end resistances is minimumCorrect
(C)The error due to heating up of wire is minimum
(D)The error due to faulty galvanometer is minimum

Answer: (B)

Solution

The end resistances (end corrections) are comparable to the resistances being compared and their relative effect is smallest when the balance point is near the

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Question ID VK-045195