Magnetism and motor effect Flashcards
Which part of the magnet are the magnetic forces strongest?
The poles
What happens when 2 magnets are brought close to eachother.
Exert a force on eachother
Type of force when two like poles brought close to eachother
Repulsive, non-contact
Type of force when two unlike poles brought close to eachother
Attractive, non-contact
What is a magnetic field
Region around magnet where another magnet experiences a non contact force
Difference between a permanent and induced magnet.
- Permanent magnet produces its own magnetic field.
- Induced magnet becomes magnetic when placed in a magnetic field.
Induced magnetism always causes what type of force.
Force of attraction
What is the effect when an induced magnet leaves a magnetic field.
Induced magnet loses most/all of its magnetism
Give 4 examples of magnetic materials
Steel
Iron
Nickel
Cobalt
What always can be said between a magnet and a magnetic material.
It is always attractive
How does strength of magnetic field alter as you move further away from magnet producing it.
Strength decreases
What direction does a magnetic field point.
- In the direction of the force a north pole would experience if placed in the field.
- From the north seeking pole to the south seeking pole of the magnet.
What does a magnetic compass contain?
A small bar magnet that points in the direction of the Earths magnetic field.
What is produced when a current flow through a conducting wire.
A magnetic field is produced around the wire.
What determines the strength of the magnetic field around a current carrying wire.
The magnitude of the current
