In the circuit shown, $P$ is a potentiometer with total resistance $10\,\Omega$ and $Q$ is a fixed resistor with resistance $10\,\Omega$. The battery has an e.m.f. of $4.0\,\text{V}$ and negligible internal resistance. The voltmeter has a very high resistance. The slider on the potentiometer is shifted from X to Y and a graph of voltmeter reading $V$ is drawn against slider position. Which graph would be obtained?
Physics 9702 · AS & A Level · Potential dividers