Question

The internal resistance of a cell of e.m.f 2V is 0.2 $\Omega$. It is connected to a resistance of 4 $\Omega$. The voltage across the cell will be

• A. 0.5 V
• B. 1.9 V
• C. 1.45 V
• D. 2 V

Answer 1

The correct option is B

1.9 V

$r=(\frac{E}{V}-1)R\Rightarrow 0.2=(\frac{2}{V}-1)\times 4\Rightarrow V=1.9volt$