Two cells of same emf `epsilon`, but different internal resistances `r_(1) " and " r_(2)` are connected to an external resistance R, as shown. The voltmeter V reads zero. Find R in terms of `r_(1) " and " r_(2)`, and the voltage across the cell of internal resistance `r_(2)`.

Two cells of same emf E, but different internal resistances r_(1)andr_(2) are connected to an external resistance R as shown in the figure given above. The voltmeter V reads zero. Obtain an expression for R in terms of r_(1)andr_(2) . Calculate the voltage across the cell of internal resistance r_(2) . (Assume that the voltmeter V is of infinite resistance).

Two cells with same e.m.f. .E. and different internal resistances r_(1) and r_(2) are connected in series to an external resistance .R.. The value of R so that the p.d. across the first cell be zero is

Two cells x and y of identical emf but different internal resistance r_(1) and r_(2) (r_(1) gt r_(2)) are connected in series to an external resistance R. If the terminal voltage across x is zero, then

Two cells of the same e.mf. e but different internal resistances r_(1) and r_(2) are connected in series with an external resistance 'R'. The potential drop across the first cell is found to be zero. The external resistance Ris

Two cells of the same e.mf. e but different internal resistances r_(1) and r_(2) are connected in series with an external resistance 'R'. The potential drop across the first cell is found to be zero. The external resistance Ris

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

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