(a(i))[1]
Observe the voltmeter scale and enter your result in Table 3.1.
(a(ii))[1]
Calculate the resistance of a section of wire of length $l = 10.0\,\text{cm}$ using $R = \frac{V}{I}$. Record your answer in Table 3.1.
(b)[2]
The student repeats the method for lengths $l = 20.0\,\text{cm}$ and $l = 40.0\,\text{cm}$ of wire and notes her results in Table 3.1. Study the values in Table 3.1. Allowing for experimental error, suggest the relationship between $l$ and $R$.
(c)[1]
The student notices that the wire is warm at the end of the investigation. Describe one precaution that the student can take to reduce this heating effect.