A cell with electromotive force (e.m.f.) $1.50\,\text{V}$ supplies a current of $0.26\,\text{A}$ to a resistor of resistance $5.0\,\Omega$ placed across its terminals. What is the internal resistance of the cell?
- A$0.04\,\Omega$
- B$0.20\,\Omega$
- C$0.39\,\Omega$
- D$0.77\,\Omega$