Choose the correct statements :
(A) If two non ideal batteries are connected in series, then equivalent emf is larger than either of the two
(B) If two non ideal batteries are connected in series, then the equivalent internal resistance is smaller than either of the two.
(C) If two non ideal batteries are connected in parallel, then the equivalent emf is smaller than either of the two
(D) If two non ideal batteries are connected in parallel then the equivalent internal resistance is smaller than the two internal resistances
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A) and (D) Only
$ε_{eq}=ε_1+ε_2$
∴ $ε_{eq}$ is larger than $ε_1$ and $ε_2$
$\frac{1}{ε_{eq}}=\frac{1}{ε_1}+\frac{1}{ε_2}$
$ε_{eq}=\frac{ε_1ε_2}{ε_1+ε_2}$
∴ $ε_{eq}$ is smaller than $ε_1$ and $ε_2$