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(i)
What is an electromagnet?
(ii)
State three uses of electromagnets in everyday life.
An electromagnet is a material that becomes magnetized when electric current flows in wire surrounding the material
Uses of electromagnets in everyday life
1. Radio 2. Telephone earpiece/Head phone 3. Loud speaker/Amplifier 4. Microphones 5. Electric bell/buzzers 6. MRI machines 7. Electric motors/generators 8. Car ignition systems 9. Magnetic locks 10. Transformers 11. Generators 12. Refrigerators 13. Television sets 14. Tape recorders 15. Hard drives
What is a magnetic field?
Magnetic field is the region around a magnet where magnetic force is experienced.
Draw a bar magnet and show the magnetic field around it.
Diagram of bar magnet with magnetic field
(Bar magnet with N and S poles; lines of force from N to S, not crossing, originating from N and ending at S)
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