can help me with this qns.
Q5. The live wire of a 240 V mains supply is protected by a 15A fuse, A 3.0 kW heater is connected to the supply. The arrangement is shown in Fig.5.1.
(a) Name the wires P, Q and R.
Fully describe the function of the earth wire.
(b) The user wishes to connect a 2.0 kW heater in parallel with the 3.0 kW heater shown in Fig.5.2. Discuss, using suitable calculations, whether this would be a sensible idea.
(c) The element in the heater is made of metal. Use kinetic theory to describe the effect on the atoms of the metal as the temperature rises.
Sachin Kumar Mittal answered this