MATHEMATICS · Multi-part · ISC · Physics · Current Electricity · Electrical energy and power
Problem
A wall socket is protected by a 15 A MCB. Three appliances are plugged into the socket: an electric kettle of 1500 W, a room cooler of 200 W and an electric iron of 1000 W. The supply voltage is 220 V.
(a) Calculate the total current drawn when all three appliances are switched on together.
(b) State whether the MCB will trip in this situation, giving a reason for your answer.
(c) Suggest one safety measure to prevent such a situation from arising.