A cell, with finite internal resistance r, is connected across two external resistances `R_1 and R_2(R_1> R_2)`, one by one. In which case would the terminal potential difference of the cell more ? Justify your anwer.

A cell of e.m.f. E an internal resistance r is connected across an external resistance R. Plot a graph showing the variation of P.D. across R, verses R.

A cell of emf E and internal resistance r is connected to two external resistance R_(1) " and " R_(2) and a perfect ammeter. The current in the circuit is measured in four different situations : (i) without any external resistance in the circuit

A cell of emf E and internal resistance r is connected to two external resistance R_(1) " and " R_(2) and a perfect ammeter. The current in the circuit is measured in four different situations : (ii) with resistance R_(1) only

A cell of emf 2 V and internal resistance 0.1Omega is connected to 3.9Omega external resistance. What will be the potential difference across the terminals of the cell?

A cell of emf E and internal resistance r is connected to external resistance R_1 and R_2 and a perfect ammeter. The current in the circuit is measured in four different situations. without any external resistance in the circuit with resistance R _1 only with R_1 and R_2 in parallel combination with R_1 and R_2 in series combination the currents measured in the four cases are 0.42 A, 1.05A, 1.4A adn 4.2 A, but not necessarily in that order. Identify the currents corresponding to the four case mentioned above.

A cell of emf E and internal resistance r is connected to two external resistance R_(1) " and " R_(2) and a perfect ammeter. The current in the circuit is measured in four different situations : (iii) with R_(1) " and " R_(2) in series combination

A cell of emf E and internal resistance r is connected to two external resistance R_(1) " and " R_(2) and a perfect ammeter. The current in the circuit is measured in four different situations : (iv) with R_(1) " and " R_(2) in parallel combination

Two cells of the same e.m.f. E but internal resistance r_1 and r_2 are connected in series to an external resistor R (fig. EP 3.25). What should be the value of R so that the potential difference across the terminals of the first cell becomes zero?