Question

The internal resistance of a cell of e.m.f. 2 V is $0.1\, \Omega$ It is connected to a resistance of $3.9\, \Omega$. The voltage across the cell will be

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

Answer 1

Answer: (A)

1.95 V

Answer 2

$i=\frac{2}{4}=0.5$ Ampere
$V= \, \varepsilon -ir$
or $V = 2-0.5 \times 0.1= 1.95\, V$