An ammeter, a $2\,\Omega$ fixed resistor and a $0\text{-}10\,\Omega$ variable resistor are connected in series with a $12\,\text{V}$ battery. A high-resistance voltmeter is connected across the fixed resistor. The resistance of the variable resistor is then altered from zero to its maximum value. Which graph shows the way the potential difference (p.d.) recorded by the voltmeter changes with the current recorded by the ammeter?
Physics 9702 · AS & A Level · Resistance and resistivity