(a)[1]
Complete Fig. 5.1 by drawing the symbol for a fuse in the gap in the circuit.
(b(i))[1]
On Fig. 5.2 sketch the current-voltage graph of a filament lamp.
(b(ii))[2]
Explain why the current-voltage graph you drew in (i) has that shape.
(c)[3]
Calculate the current at point P in the circuit diagram in Fig. 5.1.
(d(i))[1]
The lamp current is $1.5\,\text{A}$. Suggest an appropriate fuse rating for the fuse.
(d(ii))[2]
Explain why a fuse rating that is much greater than the value in (i) is unsuitable.
(d(iii))[1]
Explain why a fuse must be connected in the live wire instead of the neutral wire or earth wire.