(a)[1]
State the voltmeter reading V0.
(b(i))[2]
Use the voltmeter reading in Table 2.1 when the 10 Ω resistor is connected between X and Y to work out the current I in the circuit. Apply the equation: $I = \frac{V}{R}$. Give your answer for I in Table 2.1 to 2 significant figures.
(b(ii))[1]
The voltmeter reading V for the 47 Ω resistor is absent. Calculate V. Add your answer to Table 2.1.
(c)[4]
Plot a graph of V / V (y-axis) against I / A (x-axis). Begin both axes at the origin (0,0). Draw a best-fit straight line.
(d)[2]
Find the gradient G of your line. Show your working fully and mark on the graph the values you use.
(e)[1]
State the value of the resistance RZ. Record your answer to the nearest ohm.