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AQA GCSE Physics Magnetism and current

Magnetism and current

This page covers the following topics:

1. Magnetic field created by current
2. Strength of magnetic fields

When a current flows through a wire, a magnetic field is produced around the wire.

Magnetic field created by current

The magnetic field produced around a current carrying wire varies in strength depending on the position relative to the wire and the speed of the current in the wire.

Strength of magnetic fields

1

The magnetic field lines travel around the wire in circles. Is this statement true?

The magnetic field lines travel around the wire in circles. Is this statement true?

2

Are the magnetic field lines movements parallel or perpendicular to the wire?

Are the magnetic field lines movements parallel or perpendicular to the wire?

3

Which hand is used for the rule that allows us to see which direction the magnetic field travels in?

Which hand is used for the rule that allows us to see which direction the magnetic field travels in?

4

If the direction of the current is reversed, what effect does this have on the magnetic field?

If the direction of the current is reversed, what effect does this have on the magnetic field?

5

Does the magnetic field get stronger or weaker as you move away from the wire?

Does the magnetic field get stronger or weaker as you move away from the wire?

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