A potentiometer has uniform potential gradient across it. Two cells connected in series (i) to support each other and (ii) to oppose each other are balanced over 6 m and 2 m respectively on the potentiometer wire. The e.m.f.’s of the cells are in the ratio of

There is a definite potential difference between the two ends of a potentiometer. Two cells are connected in such a way that first time help each other, and second time they oppose each other. They are balanced on the potentiometer wire at 120cm and 60cm length respectively. compare the electromotive force of the cells. potentiometer wire at 120cm and 60cm length respectively. Compare the electromotive force of the cells.

There is a definite potential difference between the two ends of a potentiometer. Two cells are connected in such a way that first time help each other, and second time they oppose each other. They are balanced on the potentiometer wire at 120cm and 60cm length respectively. compare the electromotive force of the cells. potentiometer wire at 120cm and 60cm length respectively. Compare the electromotive force of the cells.

A cell of e.m.f. 2 V and negligible internal resistance is connected in series with a potentiometer wire of length 100 cm. The e.m.f of the Leclanche cell is found to balance on 75 cm of the potentiometer wire. The e.m.f. of the cell is

A cell of e.m.f. 2 V and negligible internal resistance is connected in series with a potentiometer wire of length 100 cm. The e.m.f of the Leclanche cell is found to balance on 75 cm of the potentiometer wire. The e.m.f. of the cell is

In a potentiometer, a uniform potential gradient of 0.8 V m^(-1) is maintained across its 10 m wire . The potential difference across two points on the wire located at 65 cm and 2.45 m is

In a potentiometer, a uniform potential gradient of 0.8 V m^(-1) is maintained across its 10 m wire . The potential difference across two points on the wire located at 65 cm and 2.45 m is

A cell of e.m.f. 4 V and of negligible internal resistance is connected in series with a potentiometer wire of length 400 cm. The e.m.f. of a Leelanche cell is found to be balacned at 150 cm from the positive end of the potentiometer wire. What is the e.m.f. of the Leclanche cell ?

A cell of e.m.f. 4 V and of negligible internal resistance is connected in series with a potentiometer wire of length 400 cm. The e.m.f. of a Leelanche cell is found to be balacned at 150 cm from the positive end of the potentiometer wire. What is the e.m.f. of the Leclanche cell ?

A potentiometer wire of length L and a resistance r are connected in series with a battery of e.m.f. E_0 is balanced at a length l of the potentiometer wire. The e.m.f. E will be given by