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WorksheetsElectromagnets and Electric Motors
Total questions: 15
Worksheet time: 15mins
What is produced by moving a permanent magnet through a coil of copper wire?
electricity
electromagnet
light
sound
The process of generating the current in a conductor is called as
Electro motive force
Electromagnetic induction
generator energy conversion
induced voltage
Which statement best explains the flow of energy through a motor?
battery-->electrical current-->copper wire rotor -->magnet--> mechanical energy
battery--> magnet--> electrical current--> copper wire rotor--> mechanical energy
magnet--> mechanical energy--> copper wire rotor--> battery--> electrical current
magnet--> copper wire rotor--> mechanical energy--> battery--> electrical current
What is an advantage of electromagnets?
They can be turned on and off.
They are very strong.
They can pick up heavy objects like cars.
All of the above.
He was credited for his discovery of electromagnetic induction.
Thomas Edison
Benjamin Franklin
Nikola Tesla
Michael Faraday
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
Add more coils of wire to the nail.
Use a smaller battery.
Reverse the poles of the magnet.
Remove all the coils and the nail.
In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.
wire, iron, electric
electric, wire, iron
iron, electric, wire
excited, hair, apple
While electric current is flowing through a wire, what surrounds the wire?
a magnetic field
a glowing light
neutrons
protons
What is most likely to happen when the switch is closed?
magnetic field should be produced
nail will rust
battery will explode
wire will catch on fire
Look at the picture what is letter A?
Armature
Commutator
Permanent Magnet
DC Source
AC Source
Look at the picture what is letter B?
Armature
Commutator
Permanent Magnet
DC Source
AC Source
Look at the picture what is letter C?
Armature
Commutator
Permanent Magnet
DC Source
Brush
What is the main function of an electromagnet in an electric motor?
To convert electrical energy into mechanical energy
To convert mechanical energy into electrical energy
To store electrical energy
To increase the voltage
Which component of an electric motor is responsible for creating a magnetic field?
The rotor
The stator
The commutator
The brushes
In an experiment, a student wraps a copper wire around a nail and connects it to a battery. What is the student likely trying to demonstrate?
The creation of a permanent magnet
The principles of electromagnetic induction
The operation of a simple electric motor
The formation of an electromagnet
