Question

The emf of a cell is 12 V. When it sends a current of 1 A through an external resistance, the p.d. across the terminals reduces to 10 V.

The internal resistance of the cell is

(A) 0.1 Ω

(B) 0.5 Ω 

(C) 1 Ω 

(D) 2 Ω

Answer 1

Correct option is: (D) 2 Ω