Why does a scrapyard crane need a magnet that can switch off? Explain how controlled magnetic effects are used in cranes, bells and motors and trace an energy transfer in a device.
Pupils try “Design a switchable pick-and-release device”. Includes the editable PowerPoint, a 50-minute lesson plan and a printable pupil sheet with equipment, instructions, example evidence and worked teacher answers.
KS3 physics for ages 11–14. Part of the magnetism and electromagnets sequence.
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