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Answer on Electric Circuits Question for Paromita Mukherjee

Question #50518
Two batteries of emf and internal resistance connected in series with each other and with an external load resistor. The current is 3 A. When the polarity of one battery is reversed the current becomes 1 A. The ratio of the emfs of the two batteries is?
1) 2.5
2) 2
3) 1.5
4) 1
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