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MHT CET Physics question

PhysicsCurrent ElectricityMHT CET

In Wheatstone bridge, the resistances in four arms are 10 , 10 , 10 and 20 . To make the bridge balance, resistance connected across 20 is

Answer: (C)

Solution

Balance needs the 20 arm to become 10 : gives (in parallel);

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Question ID VK-045311