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WorksheetsHow does an electric motor work?
Total questions: 13
Worksheet time: 7mins
Electric motors are devices that convert ____ energy into ___ energy.
electrical; mechanical
chemical; potential
mechanical; electrical
mechanical; kinetic
What is formed when a wire in an electric circuit is wrapped around an iron core producing a magnetic field?
electromagnet
magnet
generator
electric motor
The flow of electric charge in a circuit is called ____.
heat
electric current
sound
magnetic
Like magnetic poles push each other away
true
false
A magnet must always have two poles, even if cut in half, because
A magnet is made up of tiny magnetic domains that are aligned.
Magnetic domains are out of alignment.
Each pole divides in half and the magnetic field becomes weaker.
A type of magnet that has temporary magnetic effect when electric current flows through it.
This refers to...
Electric
Electrostatic
Electronic
Electromagnet
An electromagnet differs from a permanent magnet because
permanent magnets require an electrical current to produce a field
electromagnets only have one pole, while permanent magnets always have two.
electromagnets can be turned off or weakened by reducing to stopping the flow of current.
permanent magnets require the movement of electrons, while electromagnets do now.
What component becomes a temporary magnet when electricity is flowing through the circuit?
iron nail
battery
copper wire
switch
What component provides the pathway to carry electricity from component to component?
battery
switch
wire
iron nail
Which best describes how a motor works?
When a fan blows on a wire, it causes it to spin, creating a force.
When a wire that carries electrical current is placed in zero gravity, the wire experiences a force.
When a fan blows on a wire, it cases it to spin, creating an electrical current.
When a wire that carries electrical current is placed in a magnetic field, the wire experiences a force.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
Add more coils of wire to the nail.
Reverse the poles of the magnet.
Use a smaller battery.
Remove all the coils and the nail.
You can make an electromagnet stronger by: Having a _____ current in the wire.
smaller
greener
larger
water
What is the metal center of an electromagnet called?
The current
The coil
The wire
The ferromagnetic core
