An electric iron is labelled 1200 W, 220 V. A second iron of the same make is labelled 900 W, 220 V.
(a) Calculate the current drawn by each iron when connected to a 220 V supply.
(b) Each iron is used for 1.5 h daily. Compute the electrical energy consumed by each in a 30-day month, expressing your answer in kWh.
(c) The cost of electrical energy is Rs 6.00 per kWh. Determine the monthly expenditure for running each iron.
(d) Which iron will be more economical to operate over the month and by how much? State the reason for the difference in cost.