Question

Emf of a cell is 2.2 volt. When resistance R = 5 Ω is connected in series, potential drop across the cell becomes 1.8 volt. Value of internal resistance of the cell is 

(A) 10/9 Ω 

(B) 7/12 Ω 

(C) 9/10 Ω 

(D) 12/7 Ω

Answer 1

Correct option is: (A) 10/9 Ω