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MHT CET Physics question

PhysicsMagnetism and MatterMHT CET

Not in JEE Advanced syllabus

A T. G. Having radius of circular coil r and number of turns N, gives deflection with a certain current. If radius is increased to 2 R, what should be the number of turns if the galvanometer still gives a deflection of with the same current?

Answer: (B)

Solution

For constant I and , must stay constant, so doubling the radius

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Question ID VK-078549