A potentiometer wire is `100 cm` long hand a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at `50 cm` and `10 cm` from the positive end of the wire in the two cases. The ratio of emfs is:

A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells of emfs epsi_(1) and epsi_(2) are connected in series first to support one another and then in opposition. The balance points were obtaind at 60 cm and 12 cm from the same end of the wire in the two cases. find the ratio of the emfs.

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

A potentiometer wire is 500 cm long and potential difference of 4 V is maintained between the ends of the wire. The e.m.f. of the cell which balances against the length of 135 cm of the wire is

The length of a potentiometer wire is 200 cm and the e.m.f. of the battery connected to it is E. It is used to measure the e.m.f. of a cell whose internal resistance is 0.5 Omega . If the balance point is obtained at l=40 cm from the positive end, then the e.m.f. of the cell is

A potentiometer wire is 10 m long and a P.D. of 6 V is maintained between its ends. The e.m.f. of the cell which balances against a length of 200 cm of the potentiometer wire is

The length of a wire of a potentiometer is 100 cm, and the emf of its stand and cell is E volt. It is employed to measure the emf of a battery whose internal resistance is 0.5Omega. If the balance point is obtained at l= 30 cm from the positive end, the emf of the battery is

A potentiometer wire of length 100 cm has a resistance of 10 Omega . It is connected in series with a resistance R and cell of emf 2 V and of of 40 cm of the potentiometer wire. What is the value of R ?

In a meter bridge, the length of the wire is 100 cm. At what position will the balance point be obtained if the two resistances are in the ratio 1:3?

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.