The area around a magnet is called the .....
attraction zone
work area
magnetic field
hot zone
What happens when an electric current flows through a wire?
The wire begins to spin.
Nothing happens.
A field of gravity is created around the wire.
A magnetic field is created around the wire.
Increasing the number of coils in an electromagnet will _________ the power of the magnet.
decrease
increase
not affect
What type of core is best for electromagnets?
Steel
Iron
Plastic
Copper
As the strength of a magnetic field increases, the ability to attract metal objects ____________.
increases
decreases
stays the same
What conclusion can you draw from this graph?
As current increases, magnetic strength decreases.
As current increases, magnetic strength increases.
As current decreases, magnetic strength increases.
There is no relationship between current and magnetic strength.
What is/are the difference(s) between a magnet and an electromagnet? (two correct choices)
An electromagnet can be turned on/off.
A magnet can be turned off.
An electromagnet is stronger.
A _______________ is a current-carrying coil of wire with many loops.
magnet
electromagnet
solenoid
compass
How can a magnet be used to produce an electric current?
Hold a magnet next to a piece of wire.
Wrap wire around a magnet.
Spin the magnet around inside a coil of wire.
Which of the following is not a good conductor?
Copper
Silver
Aluminium
Plastic
What must the electrons do in an object to give it a magnetic field?
Flow in the same direction
Flow in the opposite direction
Collide into one another
Equal the number of protons and neutrons
What is an electromagnet?
a magnet that creates an electric current
a magnet created by an electric current
a magnet that has an electric charge
an electric charge that is magnetic
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