KS3 Unit 8j – Magnets and Electromagnets

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Magnets and

Electromagnets

KS3 Unit 8j – Magnets and Electromagnets

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Q1. Name something that can separate iron

filings from sand.

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A1. A magnet

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Q2. What do you call a magnet that can be turned on and off?

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A2. An electromagnet

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Q3. Which pole of a bar magnet points towards

the earth's Arctic magnetic pole?

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A3. The north pole

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Q4. Which pole of a bar magnet points towards

the earth's Antarctic magnetic pole?

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A4. The south pole

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Q5. What type of magnet remains

indefinitely (for ever)?

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A5. A permanent magnet

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Q6. What do we call a wire wound into a spiral

of loops?

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A6. A coil

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Q7. What do we call a coil of wire used as an

electromagnet?

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A7. A solenoid

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Q8. Name a device that uses a magnet to show

directions north and south.

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A8. A compass

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Q9. Name a sound generator that uses an electromagnet and a

chime.

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A9. An electric bell

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Q10. What do we call an electrical switch operated by an electromagnet?

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A10. A relay

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Q11. Where do old cars and other waste metals

ends up?

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A11. A scrapyard

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Q12. What word means to use again?

(Think environmentally friendly)

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A12. To recycle

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Q13. What is the central part of a transformer or electromagnet, usually made of iron, called?

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A13. The core

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Q14. What fills the volume surrounding a

magnet, often represented by a pattern

of lines?

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A14. A magnetic field

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Q15. What do we call the movement of electric

charge in a complete circuit?

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A15. An electric current

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Q16. What is the most common magnetic

element?

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A16. Iron

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Q16. Name one of the magnetic data storage devices in a computer.

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A16. The hard disk

The floppy disk

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