No Longer On Exam Flashcards
At which part of a magnet are the magnetic forces strongest?
The poles of the magnet.
What happens when 2 magnets are brought closer together?
They exert a force on each other.
Why type of force is exerted if 2 like poles of a magnet are brought near each other?
A repulsive, non-contact force.
What type of force is exerted if 2 unlike poles of a magnet are brought near each other.
An attractive, non-contact force.
What is the difference between a permanent magnet and and an induced magnet?
- A permanent magnet produces its own magnetic field.
- 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 4 examples of magnetic materials
- Iron.
- Steel.
- Cobalt.
- Nickel.
What can always 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.
How does a plotting compass work?
1) Place the plotting compass near the magnet on a piece of paper.
2) Mark the direction the compass needle points.
3) Move the plotting compass to many different positions in the magnetic field, marking the needle direction each time.
4) Join the points to show the field lines.
