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ABCDFPA is a network of three batteries ...


ABCDFPA is a network of three batteries of the e.m.f's E, 12 V and 4 V respectively and three resistance `2Omega,4Omega` and `6Omega` connected as shown in the diagram. An ideal ammeter connected between F and P shows a current reading of 0.5 A. Then the value of the e.m.f. E is

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