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

When null point is obtained in the potentiometer the current is drawn from

When null point is obtained in the potentiometer the current is drawn from

When the balance point is obtained in the potentiometer, a current is drawn from?

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

Describe how a potentiometer is used to compare the e.m.f.s of two cells by connecting them separately.

Describe how potentiometer is used to compare the e.m.f.s of two cells by combination method.

In a potentiometer experiment the balancing length is 8 m, when the two cells E_(1) and E_(2) are joined in series. When the two cells are connected in opposition the balancing length is 4m. The ratio of the e.m.f. of two cells (E_(1)//C_(2)) is