7.1 Permanent and induced magnetism, magnetic forces and fields Flashcards
At which part of the magnet are the magnetic forces strongest?
The poles of the magnet
What happens when two magnets are brought close to each other?
They exert a force on each other
What type of force is exerted if two like poles of a magnet are brought near each other?
A repulsive, non-contact force
What type of force is exerted if two unlike poles of a magnet are brought near each other?
An attractive, non-contact force
What is the difference between a permanent magnet and an induced magnet?
A permanent magnet produces its own magnetic field whereas an induced magnet becomes magnetic when placed in a magnetic field
What type of force does induced magnetism always cause?
A force of attraction
What happens when an induced magnet is removed from a magnetic field?
The induced magnet loses most/all of its magnetism
What is a magnetic field?
The region surrounding a magnet where another magnet or magnetic material experiences a non-contact force
Give four examples of magnetic materials
● Iron
● Steel
● Cobalt
● Nickel
What can always be said about the force between a a magnet and a magnetic material?
It is always attractive
How does the strength of a magnetic field alter as you move further away from the magnet producing it?
The magnetic field strength decreases the further you move away
In what direction does a magnetic field point?
In the direction that a north pole would experience a force, if placed in the field. From the north seeking pole to the south seeking pole of a magnet.
What does a magnetic compass contain?
A small bar magnet that points in the direction of the Earth’s magnetic field
