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

Last updated: 6/1/2023

The length of a wire of a potentiometer is 100 cm and the emf of its standard cell is E volts It is employed to measure the e m f of a battery whose internal resistance is 0 5 Q2 If the balance point is obtained at l 30 cm from the positive end the e m f of the battery is 1 2 3 30E 100 30E 100 5 30E 100 05