(a(i))[2]
Calculate the resistance of the lamp when it is operating at its working temperature.
(a(ii))[3]
On the axes in Fig. 6.1, sketch a graph to display the current-voltage $(I$-$V)$ characteristic of the lamp. Put an appropriate scale for current on the $y$-axis.
(b(i))[1]
Determine the total power dissipation for the heaters arranged as shown in diagram (i).
(b(ii))[1]
Determine the total power dissipation for the heaters arranged as shown in diagram (ii).
(b(iii))[2]
Determine the total power dissipation for the heaters arranged as shown in diagram (iii).