In a potentiometer experiment, the null point is obtained at 140 cm for a cell of e.m.f. 1.2 V. With another cell of unknown e.m.f., the null point is obtained at 210 cm. The unknown e.m.f. is

In a potentiometer experiment, the balancing length is found to be 1.8 m for a cell of e.m.f. 1.5 V. What is the balancing length for a cell of e.m.f. 1 V ?

In a potentiometer experiment the null point is obtained at 5.20 m for a cell. A Shunt resistance of 5 Omega is added. The new null point is at 4:00 m. What is the internal resistance of the cell ?

With a potentiometer null point were obtained at 140 cm and 180 cm with cells of emf 1.1 V and one unknown chi volts. Unknown emf is

In a potentiometer experiment, balancing length is found to be 120cm for a cell E_(1) of e.m.f. 2V. What will be the balancing length for another cell E_(2) of e.m.f. 1.5V ? (No other changes are made in the experiment).

In a potentiometer the balancing length of the wire is found to be 2.5 m for a cell of e.m.f. 1.5V . Find the balancing length of the wire fore another cell of e.m.f. 1.2 V on the same potentiometer.

The null point in a potentiometer with a cell of e.m.f. xi is obtained at a distance l on the wire. Then :

Two cells having unknown emfs E_1 and E_2 (E_1 > E_2) are connected in potentiometer circuit so as to assist each other. The null point is obtained at 8.125m from higher potential end. When cell E_2 is connected so as to oppose cell E_1 , the null point is obtained at 1.25m from the same end compare the emfs of two cells.