Q. 12

Two non-ideal bat A. Each of A and B is correct.

B. A is correct but B is wrong.

C. B is correct but A is wrong

D. Each of A and B is wrong.

Answer :

Let e1 and e2 be the emf of battery 1 and battery 2 respectively. And r1 and r2 be the internal resistance of battery 1 and battery 2 respectively.

Emf is nothing but the voltage across the terminals. The two batteries are connected in series.


The equivalent emf is e = e1+e2


The equivalent internal resistance r= r1+r2


: In series connection the equivalent emf and equivalent internal resistance are becomes larger. So statement A is correct and B is wrong. Option B is correct.

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