magnetic fields

Question 1

Describe what is meant by a magnetic field

Answer 1

A magnetic field is a region around a magnet where a force acts on another magnet
or on a magnetic material (iron, steel, cobalt and nickel).

Question 2

what does the strength of a magnetic field depend on

Answer 2

The strength of the magnetic field depends on the distance from the
magnet. The field is strongest at the poles of the magnet. where the magnetic field lines are the closest to each other

Question 3

draw the magnetic field pattern of a bar magnet showing how
strength and direction change from one point to another

Answer 3

The direction of a magnetic field line is from the north
pole of a magnet to the south
pole of the
magnet.

Question 4

Describe the evidence that proves that the earths core is magnetic

Answer 4

A magnetic compass contains a small bar magnet. The compass needle points in the direction of the Earth’s magnetic field. This is shown when a compass is held away from any magnets the needle always points in the North-south direction , proving that the Earth has a
magnetic field due to the earths core