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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

A range of galvanometer is 'V', when 50 resistance is connected in series. Its range gets doubled when 500 resistance is connected in series. Galvanometer resistance is

Answer: (D)

Solution

and , so $2(G+50)=G+500⇒ G=400\

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Question ID VK-078712