Magnetic force for SQA National 5 Physics
This page covers the following topics:
1. Attraction and repulsion, dipoles
Magnetic forces are non-contact forces. Magnets can be attracted to or repel other magnets.
Forces of attraction and repulsion allow us to use a plotting compass to see which direction is north and which is south. This happens due to non-contact forces between what two magnets?
the bar magnet in the compass and the magnet at Earth's centre
What are the units used for non-contact forces?
Newtons/N (the same as any force)
Why is magnetic force a non-contact force?
Magnetic force can be exerted between objects without them touching each other.
Touching is not necessary.
What is the definition of a dipole?
A dipole is a pair of equal and oppositely charged or magnetised poles separated by a distance.
Forces that are not non-contact are called contact forces. Give the definition of a contact force.
A contact force is a force that exists only between several objects that touch each other.
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