Two identical resistors, each of resistance 20Ω, are connected to a 200V supply for the same time interval of 5 minutes.
(i) Calculate the total heat produced when the resistors are connected in series.
(ii) Calculate the total heat produced when the same resistors are connected in parallel.
(iii) Which arrangement produces more heat? By what factor does the heat differ between the two arrangements? Explain the reason for this difference using appropriate calculations.