Question

The internal resistance of a cell of emf 2V is 0.1Ω. It is connected to a resistance of 3.9Ω. The voltage across the cell will be -

• A. 1.95V
• B. 1.9V
• C. 0.5V
• D. 2V

Answer 1

Answer: (A)

1.95V

Answer 2

i = $\frac{2}{3.9 + 0.1}$ = 0.5 Amp.

voltage across cell = E – ir = 2 – .05 = 1.95 volt