A cell with internal resistance $0.5\,\Omega$ is connected to a fixed resistor with resistance $10\,\Omega$. The resistor’s resistance is then altered to $20\,\Omega$. Which statement is not correct?
- AThe current in the circuit will halve.
- BThe e.m.f. of the cell will remain constant.
- CThe power dissipated by the fixed resistor will decrease.
- DThe terminal p.d. of the cell will increase.