Comprehension (Q. 12 to 14): In the circuit given below, both batteries are ideal. Emf \(E_1\) o....

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Comprehension (Q. 12 to 14): In the circuit given below, both batteries are ideal. Emf \(E_1\) of battery 1 has a fixed value, but \(\operatorname{emf} E_2\) of battery 2 can be varied between \(1.0 \mathrm{~V}\) and \(10.0 \mathrm{~V}\). The graph gives the currents through the two batteries as a function of \(E_2\), but are not marked as which plot corresponds to which battery. But for both plots, current is assumed to be negative when the direction of the current through the battery is opposite the direction of battery's emf. (direction of emf is from negative to positive)
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