Electricity and magnetism

The lines of force which occupy the space in around the magnetic is called _______________

• like poles

• unlike poles

• Flux Density

• Magnetic Flux

A magnet that retains its magnetism after removal of the magnetizing force, used for compasses.

• Magnetic Poles

• Permanent Magnet

• Hard Magnet

• Soft Magnet

The force of attraction or repulsion of magnetic materials

• magnetism

• magnetic force

• magnetic field

• electromagnetism

___, ____, and ____ are magnetic metals.

• Iron, Nickel, Cobalt

• Copper, Chromium, Gadolinium

• Aluminum, Iron, Copper

• Cobalt, Mercury, Sodium

Unlike poles of different magnets

• attract each other

• cancel each other out

• repel each other

How could a student go about demagnetising a piece of magnetised steel?

• place it inside the coil and pass current through it

• place it near a piece of unmagnetised metal

• expose it to temperature below zero degree

• hit it repeatedly with hammer

If the magnets above were brought close together they would…

• attract each other with a a strong force

• repel each other with a strong force

• attract each other with a weak force

• repel each other with a weak force

When magnetic field lines are drawn, how do they look?

• straight lines
• criss-crossed lines like X's
• curved lines from N to S pole and outwards
• lines extending outward in all directions like drawing the Sun

Which drawing is correct?

• 1

• 2

• 3

• 4

A magnet that loses all or most of their magnetic strength quickly

• permanent magnet

• temporary magnet

• superconductor

• electromagnet