Four resistors of 3Ω, 5Ω, 7Ω and 10Ω are connected in series with a 24V power supply.
(i) Calculate the equivalent resistance of the series combination.
(ii) Determine the current drawn from the supply.
(iii) Compute the power dissipated in the 7Ω resistor.
(iv) If the circuit operates for 10 minutes, find the electrical energy converted to heat in the 10Ω resistor.