A 5V battery with internal resistance 2Ω and a 2V battery with internal resistance 1Ω are connected in parallel with unlike polarities connected together .This combination is connected to10Ω resistor The current in the 10Ω resistor is
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a
0.27 A
b
0.05 A
c
0.25 A
d
0.03 A
answer is D.
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Detailed Solution
With opposite polarities connected in parallel the effective emf is E1r2-E2r1r1+r2