Magnetism Flashcards
Define Magnetism
The study of magnets their properties their behaviors and their influence on other materials or objects
What is a magnet
A magnet is a piece of metal which can attract certain materials.
define magnetic poles
A magnetic pool refers to the points near the ends of a magnet at which the attractive force is the greatest or the strongest
What is the meaning of magnetic length
This is the distance between the poles of magnets
Define magnetic axis
This reflects a straight line drawn through the poles of a magnet
what are the types of a magnet
temporary permanent natural and artificial
Mention three uses of a permanent magnet
is used in computer memory device to store data
It is used in refrigerators to close the door properly
It is used as a compass needle for sailors and navigators
It is used in loud speakers electromotors and videotapes
It is used as magnetic ink on checks so it can be sorted by a magnetic machine
What colors are assigned to each of the pools of a magnet
N is to red
S is blue
Mention three properties of a magnet
a magnet has two poles but if a magnet has two poles of the same kind that is the two poles are both north poles or south poles it is known as consequent poles
The force of a magnet is concentrated at the poles
Like poles repel and unlike poles attracts
When a magnet suspended and swung freely and comes to a stop the North Pole of such magnet is seeking the North Pole of the Earth and the South Pole of such magnet is seeking the South Pole of the Earth therefore the Earth is a magnet that has a north pole and a South Pole
Mention the two laws of magneticism
First law: like poles repel.
Second law: unlike poles attract
define artificial magnet
this is a magnet that is manufactured in the laboratory
What is a compass needle
a compass needle is a small magnet enclosed in a drought proof case pivoted in the middle and swings horizontally
It has its arrowhead on the north pole and the South Pole as it tail.
mention four examples of magnetic materials
iron
Cobalt
Nickel
platinum
certain alloys
steel
define temporary magnets
temporary magnets are magnets which lose their magnetic force over a short time. They lose their strength in magnetism within a short time
Define permanent magnets
this is the type of magnet which keeps strength and magnetism over a very long. Examples are a compass needle school laboratory magnets and research laboratory magnets
