In today’s physics lesson, the focus was on electrical circuits, specifically regarding the wiring of a 3-pin plug for a metal electric kettle. Students calculated the appropriate fuse rating after determining that the kettle, rated at 1200 watts and operating at 230 volts, required a fuse capable of handling a current of approximately 5.217 amperes, leading to the selection of a 7-ampere fuse. Additionally, they learned how to calculate the energy consumption of the kettle when used for 15 minutes each day over a week, resulting in a total energy usage of 7,559,000 joules. Emphasis was placed on accurate calculations to avoid errors in physics.