Question

a cell of emf e amd internal resistance r send current 1 ampere when it is connected to an external resistance 1.9 ohm but it sends 0.5A when it is connected to an external R 1.5 ohm. calculate e and r

Answer 1

cell of internal resistance r is connected to an external resistance R. ... each cell sending currents through the filament of the lamps having resistance 1.5ohms