Permanent and Induced Magnets.

Describe the force that exists between the like poles of two magnets.

• Attraction

• Repulsion

Which these materials are magnetic?

• Cobalt, iron, steel, nickel

• Aluminium, iron, steel, nickel

• Iron, lithium, steel, nickel

• Cobalt, magnesium, steel, nickel

What is the difference between a permanent magnet and an induced?

• Permanent magnets do not produced their own magnetic field.

• Permanent magnets produced their own magnetic field.

• Induced magnets are always magnetic.

• Induced magnets only turn into magnets with they are put into a magnetic field.

True or false? The force between a permanent and an induced magnet is always repulsive?

• True

• False

What happens to the magnetic field of an induced magnet when it is moved far away from a permanent magnet?

• It gets greater.

• It stops being produced.

Why are magnetic field lines closest together at the poles?

• Magnetic force is weaker

• Magnetic force is stronger

When compasses are not near magnets they all point north. Why?

• The bar magnets inside the compass line up with the Earth's magnetic field.

• The south pole of the Earth's magnetic field is actually what we call the North Pole. That's why the north pole of a compass magnet points in this direction.

• The law of attraction.

• All of the above.