Permanent and Induced Magnetism, Magnetic Forces and Fields Flashcards
Topic 7 - Magnetism and Electromagnetism
At which part of a 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 it’s own magnetic field
- An induced magnet becoes magnetic when placed in a magnetic field
What type of force does induced magnetism always cause?
A force of attraction
What happens whwen an induced magnet is removed from a magnetic field?
The induced magnet loses most/all of it’s magnetism
What is a magnetic field?
The region surrounding a magnet where another magnet or magnetic material expepriences a non-contact force
Give four examples of magnetic materials
1.Iron
2. Steel
3. Cobalt
4. Nickel
What can alaways be said about the force between 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
