This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
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You're on a roll — The question "ii. The current flowing through the 8 resistor" is incomplete as it refers to an 8-ohm resistor without a circuit diagram or further context. Please provide the full question or diagram for this part. Let's proceed with part (c) about the house appliances. (c) A house has twenty 60W bulbs, two 1000W heater and two 500W security lights. If the appliances are running on a 240V supply calculate (i) The total power in KW used when all are switched on. Step 1: Calculate the total power consumed by each type of appliance. Power from bulbs: P_bulbs = 20 × 60 W = 1200 W Power from heaters: P_heaters = 2 × 1000 W = 2000 W Power from security lights: P_lights = 2 × 500 W = 1000 W Step 2: Calculate the total power in Watts. P_total = P_bulbs + P_heaters + P_lights P_total = 1200 W + 2000 W + 1000 W P_total = 4200 W Step 3: Convert the total power from Watts to Kilowatts (KW). P_total (KW) = 4200 W1000 W/KW P_total (KW) = 4.2 KW The total power used is 4.2 KW. (ii) The total current drawn from the mains supply. Step 1: Use the formula relating power, voltage, and current. P = VI Where P is total power, V is voltage, and I is current. Step 2: Rearrange the formula to solve for current. I = (P)/(V) Step 3: Substitute the total power (in Watts) and the supply voltage. I = 4200 W240 V I = 17.5 A The total current drawn from the mains supply is 17.5 A. What's next?