Module 7 Flashcards
Where are the magnetic forces on a magnet strongest?
At the poles
What is a key characteristic of the poles of the magnet
Where the magnetic force is the strongest
What is the effect of bringing two like poles of a magnet together?
They repel
What is the effect of bringing two unlike poles of a magnet together?
They attract
Two magnets are brought together and they repel. Explain why this might be
It means that like poles were brought together
Two magnets are brought together and they attract. Explain why this might be
It means that unlike poles were brought together
What is the key characteristic of a permanet magnet?
That it produces is own magnetic field
What does it mean if an object produces its own magnetic field?
It is a permanent magnet
What is an induced magnet?
A material that becomes a magnet when it is placed in a magnetic field
An object has been placed in a magnetic field, making it also magnetic. What is this object?
An induced magnet
What type of force is always caused by induced magnetism?
Attractive force
An attractive force is always present with a magnetic object. What does this tell us about the magnetic object?
The object is an induced magnet
What happens when an inudced magnet is removed from the magnetic field?
It loses most/all of its magnetism quickly
A magnetic object is removed from a magnetic field, and loses it’s magnetism. What does this tell us about the magnetic object?
That it is an induced magnet
How can you separate a permanent magnet, induced magnet, and a non-magnetic object using a bar magnet?
The non-magnetic object will not be attracted to the bar magnet. The permanent magnet will be attracted to the bar magnet in one orientation, but the other. The induced magnet will always be attracted to the bar magnet
Define Magnetic Field
The region around a magnet where a force acts on another magnet or on a magnetic material
What is the name given to the region around a magnet where a force acts on another magnet or magnetic material?
Magnetic Field
Name four magnetic materials
Iron, Steel, Cobalt and Nickel
What do iron, steel, cobalt and nickel all have in common?
They are all magnetic materials
Describe the force between a magnet and a magnetic material
It is always a force of attraction
What determines the strength of a magnetic field?
The distance away from the magnet. The closer to the magnet, the stronger the magnetic field
What effects the direction of a magnetic field at any given point?
The direction is determined by the direction of the force that would act on another north pole placed at the point
Describe the direction of the magnetic field around a bar magnet
The direction of the magnetic filed is from the north seeking pole of a magnet to the south seeking pole of the magnet
Describe how to plot the magnetic field pattern of a magnet using a compass
Place the plotting compass at one end of the magnet, and draw a dot where the needle is pointing. Then move the compass so the back of the needle is where the dot was drawn, and put a new dot where the front of the needle is now facing, and repeat until you reach the other end of the magnet. Then draw a line joining up all the dots. Repeat for different starting points on the magnet.
