An electric heater is designed to operate on a mains supply of 230 V and to consume 1.5 kW of power.
(i) Calculate the resistance of the heating element at its operating temperature.
(ii) Determine the current drawn from the supply when the heater is switched on.
(iii) Compute the electrical energy consumed by the heater in 2 hours, expressing your answer both in kWh and in joules.