© ntscience.co.uk 2005ks3 unit 8j – magnets and electromagnets 1 magnets and electromagnets
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KS3 Unit 8j – Magnets and Electromagnets
1© NTScience.co.uk 2005
Magnets and
Electromagnets
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KS3 Unit 8j – Magnets and Electromagnets
2© NTScience.co.uk 2005
Q1. Name something that can separate iron
filings from sand.
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KS3 Unit 8j – Magnets and Electromagnets
3© NTScience.co.uk 2005
A1. A magnet
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KS3 Unit 8j – Magnets and Electromagnets
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Q2. What do you call a magnet that can be turned on and off?
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KS3 Unit 8j – Magnets and Electromagnets
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A2. An electromagnet
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KS3 Unit 8j – Magnets and Electromagnets
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Q3. Which pole of a bar magnet points towards
the earth's Arctic magnetic pole?
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KS3 Unit 8j – Magnets and Electromagnets
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A3. The north pole
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KS3 Unit 8j – Magnets and Electromagnets
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Q4. Which pole of a bar magnet points towards
the earth's Antarctic magnetic pole?
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KS3 Unit 8j – Magnets and Electromagnets
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A4. The south pole
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KS3 Unit 8j – Magnets and Electromagnets
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Q5. What type of magnet remains
indefinitely (for ever)?
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KS3 Unit 8j – Magnets and Electromagnets
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A5. A permanent magnet
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KS3 Unit 8j – Magnets and Electromagnets
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Q6. What do we call a wire wound into a spiral
of loops?
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KS3 Unit 8j – Magnets and Electromagnets
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A6. A coil
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KS3 Unit 8j – Magnets and Electromagnets
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Q7. What do we call a coil of wire used as an
electromagnet?
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KS3 Unit 8j – Magnets and Electromagnets
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A7. A solenoid
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KS3 Unit 8j – Magnets and Electromagnets
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Q8. Name a device that uses a magnet to show
directions north and south.
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KS3 Unit 8j – Magnets and Electromagnets
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A8. A compass
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KS3 Unit 8j – Magnets and Electromagnets
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Q9. Name a sound generator that uses an electromagnet and a
chime.
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KS3 Unit 8j – Magnets and Electromagnets
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A9. An electric bell
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KS3 Unit 8j – Magnets and Electromagnets
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Q10. What do we call an electrical switch operated by an electromagnet?
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KS3 Unit 8j – Magnets and Electromagnets
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A10. A relay
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KS3 Unit 8j – Magnets and Electromagnets
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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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KS3 Unit 8j – Magnets and Electromagnets
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Q12. What word means to use again?
(Think environmentally friendly)
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KS3 Unit 8j – Magnets and Electromagnets
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A12. To recycle
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KS3 Unit 8j – Magnets and Electromagnets
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Q13. What is the central part of a transformer or electromagnet, usually made of iron, called?
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KS3 Unit 8j – Magnets and Electromagnets
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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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KS3 Unit 8j – Magnets and Electromagnets
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Q15. What do we call the movement of electric
charge in a complete circuit?
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KS3 Unit 8j – Magnets and Electromagnets
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A15. An electric current
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Q16. What is the most common magnetic
element?
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KS3 Unit 8j – Magnets and Electromagnets
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A16. Iron
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KS3 Unit 8j – Magnets and Electromagnets
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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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KS3 Unit 8j – Magnets and Electromagnets
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