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Magnets Answers

   1. What happens if you hold the north poles of two different magnets close to each other?

  They will repel each other 

 

   2. What happens if you hold a south pole and a north pole of two different magnets close to each other?

  They will attract to each other

  

   3. What is the cause of the earth magnetic field?

  A - The movement of liquid iron in the Earth’s outer core.

 

   4. State two magnetic materials.

  Iron, Cobalt, Nickel, Aluminium, Neodymium, Magnetite

   5. Why is iron a suitable material for the core of a transformer?

  It is easily magnetised 

   6. What is a solenoid? 

  A cylindrical coil of wire that acts as a magnet when an electric current is passed through it 

   7.  Give one example of a use for an electromagnet.

  They are used in hard drives, motors and speakers. Many more

 

   8.  Give one example of a use for a permanent magnet.

  Fridge magnets, screwdrivers, jewellery

 

   9.  Do the lines of a magnetic field travel from:

  B - South to north 

   10. What is a tempory magnet? 

  A tempory magnet is a magnet that is only magnetic for a short period of time