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ob 3 7 battery of 10 volt is connected to a resistance of 20 ohm...

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ob 3 7 battery of 10 volt is connected to a resistance of 20 ohm through a variable resistance R The amount o charge which has passed in the circuit in 4 minutes if the variable resistance R is increased at the rate of ohm min is 1 120 coulomb 120 loge 2 dq V dt R dq dR V dR dt R 1 q 12 V coulomb dq 12 V 40 dR R dR R 12 V log 40 log 20 20 12 x 10 x log 2 B 120 log 2 coulomb 60 D loge 2 coulomb

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