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!
Team 3 disconnected the batteries. Immediately, all clips fell. Unlike a permanent magnet, their electromagnet worked .
Lesson applied: Electromagnets are – useful for cranes, electric bells, and switches. Key Takeaways from Formative Practice 7.2 (Science Form 2) | Factor | Effect | Team 3’s Action | |--------|--------|------------------| | Core material | Iron/steel gives strong magnetism | Used iron nail | | Number of coils | More coils → stronger field | 50 coils | | Current (Voltage) | Higher current → stronger field | 3 batteries | | Temporary nature | Only magnetic when electricity flows | Demonstrated by switching off | Moral of the Story: Understanding scientific principles helps you design better solutions. Team 3 won not by luck, but by applying what they learned in Formative Practice 7.2 – and you can too! Would you like a short quiz based on this story to test your understanding? 😊 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.
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?” Lesson applied: The , the stronger the electromagnet
“Quick, let’s use three batteries!” Lina said.
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
They connected three batteries. The wire got slightly warm, but the electromagnet became a beast – lifting and winning the competition.
Result: Their electromagnet now lifted – more than double.
