Chapter 7 - Magnetism Flashcards
What is magnetism?
Describes all phenomena related to magnets
What do all magnets have regardless of shape?
A North and South Pole
Where is the magnetic force the strongest on a magnet?
The two ends of a magnet (poles) is where the magnetic force is the strongest
When opposite poles are placed near one another, what happens?
Attraction
North x South
When like poles are places near one another, what happens?
Repulsion
North x North
South x South
What is the Earth’s magnetic field? /2
The North Pole is actually a magnetic South.
The South Pole is actually a magnetic North.
When using a compass, why is the geographic North Pole is necessarily a magnetic South Pole?
Your compass needle hand is the North Pole of a magnet, so it’s tracked to the magnetic South of the Earth’s magnetic field.
What happens cut a magnet in half?
Two smaller magnets are formed.
N—S
✂️
N-S. N-S
What is a magnetic field? /3
The area of space in which the magnetic force of a magnet can act on another magnet
Represented by magnetic field lines
From North to South
What are the properties of magnetic field lines? /3
Magnetic field lines ALWAYS move in the direction of North to south (exit the North, enter the south).
Magnetic field line NEVER CROSS
Magnetic field is stronger at the poles and this is represented by drawing the lines of force closer together
What is electromagnetism?
Describes all phenomena resulting from the interaction between electricity and magnetism
What does the X in current direction symbolize? /2
Means the electrical current in going into the page (electric flow)
Direction: clockwise
What does the ⚫️ in current direction symbolize? /2
Means the electrical current is going out of the page (conventional flow)
Direction: counter-clockwise
What are the magnetic forces of attraction and repulsion? /3
How magnets interact with each other
The South Pole of one magnet will be attracted to the North Pole of another = opposite magnetic poles attract each other
However..
The South Pole of one magnet will be repelled by the South Pole of another = like magnet poles repel each other
What is conventional current?
Where the current goes from the positive terminal of the power supply to the negative terminal
POSITIVE TO NEGATIVE
