Permanent & Induced Magnets
This lesson covers:
- What a magnetic material is
- The differences between 'permanent' magnets and 'induced' magnets
A magnetic material is any material or object that can be influenced by a field, and has the potential to become a magnet.
|
Which of the following elements are magnetic?
(Select all that apply)
Nickel
Iron
Copper
Cobalt
|
Which type of magnetism is it when a magnetic material temporarily becomes a magnet when it's placed close to a permanent magnet?
|
Which of the following are correct?
Temporary / induced magnets always produce their own magnetic field
Temporary / induced magnets only produce a magnetic field in the presence of another magnet
Permanent magnets always produce their own magnetic field
Permanent magnets only produce a magnetic field in the presence of another magnet
|
The force between a permanent and an induced magnet will:
Can be attractive or repulsive
Always be repulsive
Always be attractive
|
Magnetic materials that gain and lose magnetism quickly are called magnetically materials.
Magnetic materials that gain and lose magnetism slowly are called magnetically materials.
|
steel / iron
An example of a magnetically soft material is .
And example of a magnetically hard material is .
|