MHT CET 2023 Physics question
In a meter bridge experiment null point is obtained at cm from the left end. If the meter bridge wire is replaced by a wire of same material but twice the area of across-section, then the null point is obtained at a distance
Answer: (B)
Solution
At the balance point of a meter bridge, . The two parts of the bridge wire have the same cross-section area and resistivity, so cancels from the ratio. Doubling the cross-sectional area (same material) changes the
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