Magnetism Flashcards
What is a permanent magnet?
Material that creates its own magnetic field
What is a magnetic field?
Forces around an object where a magnetic material will experience a force
What happens when like and unlike poles are brought together?
Attraction
What happens to the strength of the magnetic field as you get further away
It decreases/gets weaker
Where is the magnetic field strongest?
Poles
In which direction to magnetic field lines point?
North to South
What does distance between magnetic field lines suggest?
The strength of the magnetic field
What is an induced magnet?
A material that becomes magnetic when placed in a magnetic field
What does a magnetic compass contain?
Small bar magnet
What is produced around a wire when an electrical current flows through it?
Magnetic field
What factors does the strength of the magnetic field around a straight wire depend on?
Size of current, distance from the wire
What effect does shaping the wire into a solenoid have on the magnetic field strength?
Increases strength of the magnetic field
How can the strength of the magnetic field inside a solenoid be increased?
Add iron core
What does Flemings left hand rule show?
The orientation of force, current of conductor and magnetic field (for motor effect)
Symbol for magnetic flux density, and the units it’s measured in
B
Measured in tesla (T)
