Magnets and Magnetic Fields Flashcards
(23 cards)
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 a permanent magnet?
A permanent magnet produces its own
magnetic field.
What is an induced magnet?
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
magnet and a magnetic material?
It is always attractive
How does the stength 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 noth seeking pole to south seeking pole of a magnet
Wha does a magnetic compass contain?
A small bar magnet that points in the direction of the Earths magnetic field
What is produced when current flows through a conductng wire?
A magnetic field is produced around the wire
How is the magnetic field formed around a wire carrying an electric current?
circular magnetic field
What determines the strength of the magnetic field around a currnet current-carrying wire?
- The magnitude of the current flowing through the wire. -The distance from the wire
What does a magnetic compass provide evidence of?
The earths core being magnetic
What is a magnet?
A magnet is an object that produces its own magnetic field.
What is a magnetic material
A magnetic material is any substance that is attracted to a magnet.
What happens to a piece of magnetic material when placed in a permanent magnet’s field?
It becomes an induced magnet, developing its own magnetic field with a north and south pole.
What is a solenoid
A coil wire which when current passed through creates a strong magnetic field.
Describe the magnetic field found inside a solenoid
Strong and uniform
