A set of 4 cells each of emf 2V and internal resistance 1.5 ohm are connected across external load of 10 ohm with two raw cells in each branch. Calculate the current in each branch and potential difference across 10 ohm.

As two braches are in parallel with 2 cells in each branch.net resistance in each branch r1 = 1.5+1.5=3 ohm because they are connected in seriessimilarlyr2 = 1.5+1.5=3 ohm equivalent resistance of these two braches 1r= 13+13r = 1.5 ohmnet resistance of the circuit Req = 10+1.5 11.5 ohmnet current in the circuit I = VReq =select: 411.5I = 0.35 ohmvoltage across 10 ohm = 10×.35 = 3.5 volt.voltage across r1and r2 = 4-3.5 = 0.5 vcurrent in each brach = 0.35/3 = 0.11 A

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