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:D
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