(a)[1]
What is the meaning of the ohm?
(b(i))[2]
Demonstrate that $$\frac{\text{resistance of filament wire}}{\text{total resistance of connecting wires}} = 1000.$$
(b(ii))[1]
Use the information in (i) to explain qualitatively why the power dissipated in the lamp’s filament wire is greater than the total power dissipated in the connecting wires.
(b(iii))[3]
The lamp is rated $12\,\text{V},\;6.0\,\text{W}$. Use the information in (i) to find the total resistance of the connecting wires.
(b(iv))[3]
The diameter of the connecting wires is reduced. The total length of the connecting wires and the resistivity of the metal of the connecting wires stay unchanged. State and explain the change, if any, in the resistance of the filament wire of the lamp.