A potentiometer wire AB is 2 m long and has total resistance of 10 2...
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A potentiometer wire AB is 2 m long and has total resistance of 10 2 Galvanometer shows zero deflection at C when switch S is closed and at point D when switch is open If E 10 V and R 9r then CD is equal to X cm Find the value of 20 V Answer ww r
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