Two resistors, 4Ω and 9Ω, are each connected separately across the terminals of the same 6V battery.
(i) For each resistor, calculate the current drawn from the battery.
(ii) For each resistor, calculate the rate at which it converts electrical energy into heat.
(iii) Using your answers, state which resistor gets hotter per unit time. Support your conclusion by finding the ratio of the two power values.