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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

A Voltmeter has a range 0-V with a series resistance R. With a series resistance 2R its range is 0-V'. The correct relation between V and V' is

Answer: (A)

Solution

With galvanometer resistance G and full-scale current , and , so

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Question ID VK-078548