For a cell, the terminal potential difference is when the circuit is open and reduces…

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

Problem

For a cell, the terminal potential difference is

2.2\text{ V}

when the circuit is open and reduces to

1.8\text{ V}

when the cell is connected to an external resistance

R=5\Omega

. The internal resistance of the cell is (a)

\frac{10}{9}\Omega

(b)

\frac{9}{10}\Omega

(c)

\frac{11}{9}\Omega

(d)

\frac{5}{9}\Omega