(a)[1]
Record the ammeter reading shown in Fig. 2.2.
(b(i))[1]
Enter, in the last row of Table 2.1, the voltmeter reading shown in Fig. 2.3.
(b(ii))[1]
Calculate the resistance R of 100.0 cm of the resistance wire, using the equation $R = \frac{V}{I}$. Record R in the last row of Table 2.1.
(b(iii))[1]
Complete the column headings in Table 2.1.
(c)[4]
Plot a graph of resistance $R / \Omega$ (y-axis) against length $d / \text{cm}$ (x-axis). Draw a best-fit line.
(d)[3]
Use your graph to determine the resistance $R_{75}$ of a length $d = 75.0\,\text{cm}$ of the resistance wire. Show clearly on the graph how you obtained the value.