7. Magnets Flashcards
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 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 four examples of magnetic materials
- Iron; 2. Steel; 3. Cobalt; 4. 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 can we predict the direction of magnetic field lines around a wire?
Right hand grip
What does your thumb represent in the right hand grip rule?
Direction of current
