75 The length of a wire of a potentiometer is 100 cm and the

Last updated: 6/20/2023

75 The length of a wire of a potentiometer is 100 cm and the emf of its cell is E volt It is employed to measure the emf of a battery whose internal resistance is 0 5 Q2 If the balance point is obtained at 1 30 cm from the positive end the emf of the battery is 30E a b c d 100 5 30E 100 0 5 30 E 0 5i where i is the current in the potentiometer 9 100 wire 30E 100