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Electromagnets 01

This is a simple electromagnet. Electromagnetic effect is used in any appliance with a motor. (Picture courtesy of cobalt_grrl at Flickr)

Electromagnets 01

In the field of Science, electromagnetism is one of the four fundamental interactions of nature. A magnet can be made using electricity. See how much you know in our first electromagnets quiz and try not to get too stuck!

Which of these options do you prefer?

  1. The magnetic field around a straight wire carrying an electric current has .......

  2. The magnetic field around a coil of wire carrying current .......

  3. If the current direction through the wire is reversed, the direction of the magnetic field .......

  4. If the current in the wire increases, what happens to the strength of the magnetic field?

  5. Which of the following is NOT true about the magnetic field around a coil of wire carrying a current?

  6. What is the difference between an electromagnet and a permanent bar magnet?

  7. Which of the following uses an electromagnetic effect?

  8. A relay uses a small current to .......

  9. A relay is used in .......

  10. An electromagnet is used in a scrapyard because .......

Quiz written by Sue Davison

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