Five cells each of emf E and internal resistance r send the same amount of current through an external resistance R whether the cells are connected in parallel or in series. Then the ratio `((R)/(r))` is

Three similar cells, each of emf 2 V and internal resistance r Omega send the same current through an external resistance of 2 Omega when connected in series or in parallel. The strength of the current flowing through the external resistance is (A)

Four cells, each of emf E and internal resistance r , are connected in series across an external resistance R By mistake one of the cells is connected in reverse. Then the current in the external circuit is

Four cells, each of emf E and internal resistance r, are connected in series across an external resistance R. By mistake one of the cells is connected in reverse. Then, the current in the external circuit is

Four cells each of emf E are internal resistance r, are connected In series across an external resistance R. By mistake one of the cells is connected in reverse. Then the current in the external circuit is

Four cells, each of emf E and internal resistance r, are connected in series across an external resistance reverse. Then, the current in the external circuit is

There are n cells, each of emf E and internal resistance r, connected in series with an external resistance R. One of the cells is wrongly connected, so that it sends current in the opposite direction. The current flowing in the circuit is