MHT CET Physics question

Which of the following statement is not correct in metre bridge experiment ?

(A)The resistance wire must be of uniform cross sectional area.
(B)The readings should be taken at the middle of wire.
(C)The readings should be taken by interchanging the positions of known and unknown resistance.
(D)The jockey should be changed.Correct

Answer: (D)

Solution

Statements (a), (b) and (c) are correct precautions (uniform wire, null point near the middle, interchange of resistances to remove end errors),

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Question ID VK-044985