Module 3a Ultimate Magnetism Quiz

the + symbol on a wire cross section drawing means

An electromagnet's poles may be reversed by:

How can a wire become magnetic?

Artificial magnets can be classed as? (tick 2)

Demagnetise a magnet by (tick all that apply)

The theory of magnetism based on electron spin principle is?

Another name for retentivity or residual magnetism

Using the left hand grasp rule for a coil (electron current flow), the thumb points to what?

What device takes in mechanical energy and produces electricity?

Circular induced currents generated in a conductor

Eddy currents can be used in

The strength of an electromagnet depends on

parallel conductors with currents flowing in same direction means field

The amount of flux density a material retains when the magnetising force is removed

What causes magnetism?

What do the lines around this magnet represent?

If you cut a magnet in half, what happens to the poles?

The theory of magnetism that considers molecular alignment of the material is?

You can't stop lines of magnetisim, but you can use a sacrificial piece of material called what?

What is responsible for the Magnetic Field around Earth?

The iron filing pattern a magnet makes is caused by what?

Increase turns in wire will increase magnetism in a coil

The strongest part of a magnet is...

As the distance between two magnets increases (they get farther apart), the force between them:

Which direction is the North Pole of this electromagnet? (electron current flow)

Electric motors are devices that convert _____ energy into  _____ energy.

What kind of magnet can be turned on and off?

Bar magnets should be stored

In un-magnetized materials the domains are __________ aligned.

Magnetism is generated by moving

Lines of magnetism leave the end of magnets at what angle

The point where no additional amount of magnetism can be induced in a material