A heating element is designed to be used on a 220V mains supply. For safety reasons the current through it must not exceed 8A.
(i) Determine the maximum electrical power that can be safely dissipated in the element.
(ii) Calculate the minimum resistance the element should have so that the current limit is not exceeded at 220V.
(iii) The element is operated at this maximum safe power for 6 hours each day over 30 days. If electrical energy costs Rs. 6 per kWh, find the total cost of operating the element for the month.