Two non-ideal batteries are connected in series. Consider the following statements: (A) The equivalent emf is larger than either of the two emfs. (B) The equivalent internal resistance is smaller than either of the two internal resistances.

Question

Philoid · Accepted 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.

Two non-ideal batteries are connected in series. Consider the following statements:(A) The equivalent emf is larger than either of the two emfs.(B) The equivalent internal resistance is smaller than either of the two internal resistances.

Two non-ideal batteries are connected in series. Consider the following statements:
(A) The equivalent emf is larger than either of the two emfs.

(B) The equivalent internal resistance is smaller than either of the two internal resistances.