You are provided with a resistance box R, voltmeter, key, cell of e.m.f. E, constantan wire, standard resistor, RX, an ammeter, and other necessary apparatus.

(i) Measure and record the e.m.f. E of the cell provided.

(ii) Set up the circuit as shown in the diagram above.

(iii) Set R to 1\(\Omega\). Close the key, read and record the current I and the corresponding voltage V.

(iv) Repeat the procedure for four other values of R= 2\(\Omega\), 4\(\Omega, 6\(\Omega\), and 8\(\Omega\).

(v) In each case, read and record I and V.

(vi) Tabulate the reading.

(vii) Plot a graph of V on the vertical axis and I on the horizontal axis.

(viii) Determine the slope s, of the graph.

(ix) State two precautions are taken to ensure accurate results

(b) )State two advantages of connecting identical cells in parallel.

(ii) State two factors to consider in choosing the material for the design of a resistor