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Question

The net emf and internal resistance across AB of three batteries as shown in figure is:
967933_9bfd601be14b4b40a5d128402b5bc16e.png

A
2V,1Ω
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B
2V,2Ω
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C
2V,1.5Ω
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D
4V,2Ω
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Solution

The correct option is A 2V,1Ω
VAB+I3+2I18=0
VAB+I3+2(II1)+10=0
Solving these above equations,
VAB=2V
For 1Ω is internal resistance

896560_967933_ans_f79fbb7e723649c288b1c5abd3a257dd.png

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