1.

Two batteries A and B each of e.m.f. 2V areconnected in series to an external resistanceR = 1 ohm. If the internal resistance of batteryA is 1.9 ohm and that of B is 0.9 ohm, what isthe potential difference between the terminals ofbattery A16.(1) 2V(3) Zero(2) 3.8 V(4) of above

Answer»

Total resistance is = 1.9+0.9+1 = 3.8 Ω

so current = (2+2)/3.8 = 4/3.8 = 20/19

now P.D around A = i*r1 = 20/19*(1.9) = 2v

option 1



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