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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

A galvanometer of resistance 50 is connected to a battery of 3 V along with a resistance of 2950 in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be

Answer: (A)

Solution

Initially mA gives 30 divisions; for 20 divisions mA so the total resistance is and the

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Question ID VK-078656