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.
ScanSolve AI Answer
Here's the solution for 1 (b): b) A 100 W heater is connected to a 240 V mains supply. Calculate the: i) current drawn; Step 1: Use the formula for power, P = VI, where P is power, V is voltage, and I is current. Given P = 100\, W and V = 240\, V. I = (P)/(V) I = 100\, W240\, V I = (10)/(24)\, A I = (5)/(12)\, A I ≈ 0.41666...\, A I ≈ 0.42\, A ii) resistance of the heater. Step 1: Use the formula for resistance, R = (V)/(I), where R is resistance. Using V = 240\, V and I = (5)/(12)\, A (from part i): R = 240\, V(5)/(12)\, A R = 240 × (12)/(5)\, R = 48 × 12\, R = 576\, Alternatively, using P = (V^2)/(R): R = (V^2)/(P) R = (240\, V)^2100\, W R = 57600\, V^2100\, W R = 576\, R = 576\, That's 2 down. 3 left today — send the next one.