Result: Their electromagnet now lifted – more than double.
Lesson applied: (more batteries) increases magnetic strength. But too much current can overheat the wire – a real-world safety point. Final Challenge: The Temporary Magnet The teacher then asked: “What happens when you turn off the electricity?” formative practice 7.2 science form 2
Rizman suggested, “Let’s wrap 50 coils instead of 20.” Lina calculated: more coils = stronger magnetic field. They carefully wound 50 tight coils around the nail. Result: Their electromagnet now lifted – more than double
They connected three batteries. The wire got slightly warm, but the electromagnet became a beast – lifting and winning the competition. Final Challenge: The Temporary Magnet The teacher then
Here’s a useful, engaging story based on (Science Form 2), which typically covers Electricity and Magnetism – specifically, electromagnets , factors affecting their strength, and their applications. Title: The Great Scrap Yard Challenge At SMK Seri Bakti , Form 2 Bestari was split into teams for a hands-on science competition. The challenge: design the most effective electromagnet to lift scrap metal (paper clips) from a container to a finishing box 30 cm away.
Team 3 disconnected the batteries. Immediately, all clips fell. Unlike a permanent magnet, their electromagnet worked .
Lesson applied: The , the stronger the electromagnet. Round 3: The Current Surprise Siti noticed Team 4 had connected two batteries in series. Their electromagnet lifted 30 clips!