Two cells each of emf E and internal resistacne `r_(1)" and "r_(2)` respectively are conneted in series with an external resistance R. The potential defference between the terminats of the first cell will be zero when R equal to

A circuit consists of two cells, each of e.m.f. E and internal resistances r_(1) and r_(2) are connected in series through an external resistance X. If the potential difference between the ends of the first cell is zero, the value of X in terms of r_(1) and r_(2) will be

A circuit consists of two cells, each of e.m.f. E and internal resistances r_(1) and r_(2) are connected in series through an external resistance X. If the potential difference between the ends of the first cell is zero, the value of X in terms of r_(1) and r_(2) will be

Two cells of emf 3V and 5V and internal resistance r_(1) and r_(2) respectively are in series with an external resistance R. if the p.d. across 1 st cell is zero, then R is

Two cells with the same emf E and different internal resistances r_(1) and r_(2) are connected in series to an external resistances R . The value of R so that the potential difference across the first cell be zero is

Two cells, whose e.m.f.'s are same are connected in series. Their internal resistance are r_1 and r_2 respectively and r_1gtr_2 . When this combination is connected with an external resistance R then potential difference between the terminals of first cell becomes zero. The value of resistance R will be

Two cells of emf 2E and E with internal resistance r_(1) and r_(2) respectively are connected in series to an external resistor R (see figure). The value of R, at which the potential difference across the terminals of the first cell becomes zero is

Tow cells with the same emf E and different internal resistances r_(1) and r_(2) are connected in series to an external resistances R . The value of R so that the potential difference across the first cell be zero is

Two cells each of emf e but internal resistances r_1 and r_2 are connected in series through an external resistance R. IF the potential difference across the first cell is zero while current flows,the relation of R in terms of r_1 and r_2 is

Two cells each of emf e but internal resistance r_1 and r_2 are connected in series through an external resistance R. IF the potential difference across the first cell is szero while current flow, the relation of R in terms of r_1 and r_2

Two cells each emf e but of internal resistance r_1 and r_2 are connected in series through and external resistance R. IF the potential difference across the first cell is zero while current flows the value of R in terms of r_1 and r_2 is