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MHT CET Physics question

PhysicsCurrent ElectricityMHT CET

A wire of length 100 cm is connected to a cell of e.m.f. 2 V and negligible internal resistance. The resistance of the wire is . The additional resistance required to produce a potential drop of 1 millivolt per cm is

Answer: (C)

Solution

The p.d. across the wire must be V, so A and total resistance

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Question ID VK-045259