An electric circuit was set-up as shown in the diagram above.
The position of the sliding contact, C, was adjusted on the rhcostat, AB, such that the ammeter reading o was zero.  The corresponding voltmeter reading Vo was read and recorded.

The procedure was repeated for six other values of ammeter reading Ii
In each case, the corresponding value of the voltmeter reading, Vi was read and recorded.
Fig 3(a) and Fig.3(b) represent the ammeter and voltmeter readings respectively.

1. Read and record the values, Ii, where i = 1,2,3,4,5 and 6
2. Read and record the corresponding voltmeter readings, Vi, where i = 1,2,3,4,5 and 6
3. Tabulate your readings.
4. Plot a graph with V on the vertical axis and I on the horizontal axis
5. Determine the slope, s, of the graph and the intercept, c, on the vertical axis
6. Evaluate K =
7. State two precautions that are necessary to ensure accurate results when performing this experiment.

(b)       (i)         State four factors which affect the resistance of a metallic conductor
(ii)        Define electromotive force.
This question was the most popular among the candidates and it was well attempted by most responding candidates.  The observations was well handled.  Graph of V against I was satisfactorily plotted.  Slope, intercept and deductions were well attempted however, few could not obtain the intercept from the graph because they did not start the graph from the origin (00,).
Evaluation of K =  was well attempted except for few candidates that did not record Vo.
Precautions were well stated.  In part (b), the factors affecting the electrical resistance of a metallic conductor were well stated but majority of the candidates could not define correctly the term electromotive force.