The circuit shown here is used to compare the e.m.f. of the two cells `E_(2) (E)_(1) gt E_(2)`. The null point is at `C` when the galvanometer is connected to `E_(1)`. When the galvanometer is connected to `E_(2)`, the null point will be

A potentiometer experiment is set up to compare the e.m.f.'s E_(1) and E_(2) of two cells. When the null point is obtained, the current is drawn from

In a potentiometer experiment of measuring the e.m.f. of a cell, the null point is at 300 cm, when we have a resistance of 200 Omega in series with the cell and the galvanometer. If the resistance is increased to 300 Omega , the null point will be shifted through

A potentiometer is used for the compaisem of e.m.f. of two cells E_(1) and E_(2) . For cell E_(1) the no deflection point os obtained at 20 cm and for E_(2) the no deflection point is obtained at 30 cm . The ratio of their e.m.f.'s will be

A potentiometer is used for the compaisem of e.m.f. of two cells E_(1) and E_(2) . For cell E_(1) the no deflection point os obtained at 20 cm and for E_(2) the no deflection point is obtained at 30 cm . The ratio of their e.m.f.'s will be

A potentiometer is sued for the comparison of emf of two cells E_(1) and E_(2) . For cell E_(1) the no deflection point is obtained at 20cm and for E_(2) the no deflection point is obtained at 30cm. The ratio of their emf's will be

Instead of voltmeter, potentiometer is always used to measure e.m.f. of cell, because at the null point, the potentiometer

In the circuit shown in Fig., the cell is ideal with e.m.f = 2V. The resistance of the coil of the galvanometer G is 1Omega . Then

Two cells of emf E_(1) and E_(2) are to be compared in a potentiometer (E_(1) gt E_(2)) . When the cells are used in series correctly , the balancing length obtained is 400 cm. When they are used in series but E_(2) is connected with reverse polarities, the balancing obtaiend is 200cm. Ratio of emf of cells is

Two cells of emf E_(1) and E_(2) are to be compared in a potentiometer (E_(1) gt E_(2)) . When the cells are used in series correctly , the balancing length obtained is 400 cm. When they are used in series but E_(2) is connected with reverse polarities, the balancing obtaiend is 200cm. Ratio of emf of cells is