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Question
When unknown resistance is determined by meter bridge, the error due to contact resistance
is minimized ______.
(A) by connecting both the resistances only in one gap.
(B) by interchanging the positions of known and unknown resistance.
(C) by using uniform wire.
(D) by obtaining the null point near the ends of the wire.
Solution
(B) by interchanging the positions of known and unknown resistance.
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