WorksheetsElectromagnetism Quiz Review
Total questions: 30
Worksheet time: 30mins
The ability to change something or "do work" is called __________.
inertia
force
energy
osmosis
The flow of electrons through a material is called a/an____________.
plasma
electric current
an insulator
an armature
Materials that will NOT allow electric current to flow are called ______________________.
conductors
insulators
components
electromagnets
___________________ are materials that WILL allow electric current to flow through them.
Components
Insulators
Electromagnets
Conductors
A(n) ________________________ is a complete pathway for electricity to flow.
electric current
electromagnetism
closed circuit
ferromagnet
The Law of Conservation of Energy states that ____________________.
energy can only be created or destroyed, not changed.
energy cannot be created, only destroyed.
energy cannot be created or destroyed, only changed from one form to another.
energy cannot be created or destroyed, only hidden.
The arrow in the diagram is pointing to the __________ of an electric motor.
solenoid
casing
permanent magnets
motor shaft
The arrow in the diagram is pointing to the ______________.
brushes
casing
commutator
motor shaft
The arrow in the diagram is pointing to the __________ of an electric motor.
brushes
electromagnets
commutator
permanent magnets
The arrows in the diagram are pointing to the __________ of an electric motor.
ferromagnetic core
solenoid(s)
motor brush(es)
permanent magnet(s)
The arrow in the diagram is pointing to the part of the armature in a motor that turns electric current "on" and "off" called the __________.
motor shaft
armature
commutator
casing
The arrow in the diagram is pointing to a(n) ____________.
solenoid(s)
electromagnet(s)
commutator(s)
permanent magnet(s)
The arrows in the diagram are pointing to the ________________.
motor brush(es)
electromagnet(s)
electrical wires
permanent magnet(s)
_______________ is the flow of electric charges through a material.
Electrical componenets
Electric current
A conductor
An insulator
Identify the correct order of the energy transformations when an electric motor spins.
nuclear to chemical to electrical to magnetic to light and sound
chemical to magnetic to mechanical to thermal and sound
elestic to thermal to gravitational to light and nuclear
chemical to electrical to magnetic to mechanical to thermal and sound
The _______________ are the coils of wire with an electric current running through them.
solenoid(s)
electromagnet(s)
commutator
motor shaft
The part of an electric motor that rotates inside the casing is called the _______________.
motor shaft
electromagnet(s)
commutator
armature
In order to have a complete electric circuit, you must have ________________.
metal touching magnets
plastic touching plastic
metal touching metal
metal not touching metal
The __________ is the part of the armature in an electric motor that turns to operate a device.
brushes
casing
commutator
motor shaft
The __________ attract and repel the electromagnets on the armature.
brushes
permanent magnets
commutator
soleniods
The __________ turns electric current "on" and "off" automatically.
motor shaft
armature
commutator
casing
The __________ are needed along with solenoids to create electromagnets on the armature.
commutators
solenoid(s)
motor brush(es)
ferromagnetic core
The armature would not spin if it was not for the gaps in the __________.
motor shaft
commutator
armature
casing
The __________ acts as a temporary magnet(s) when electric current is running through it in an electric motor.
solenoid(s)
electromagnet(s)
commutator(s)
permanent magnet(s)
The ____________ are the part of an electric motor that brings electric current to the commutator.
motor brush(es)
electromagnet(s)
electrical wires
permanent magnet(s)
The _______________ bring electric current to the rest of the armature and help to create electromagnets.
solenoid(s)
electromagnet(s)
commutator
motor shaft
How can you increase the strength of an electromagnet?
Add more coils of wire.
Increase the strength of the battery.
Use a thicker piece of iron (ferromagnetic core)
Use a thicker piece of wire.
All answers are correct.
Of the steps listed below, what step would happen "FIRST" to get an electric motor to spin?
The armature and motor shaft spins and does the work for the device.
You need to close the electric circuit, turning the electric motor “on”.
Electric current travels through the brushes to the commutator.
The commutator transfers the electric current to the electromagnets
The electromagnets attract and repel with the permanent magnets.
Of the steps listed below, what step would happen "THIRD" to get an electric motor to spin?
The armature and motor shaft spins and does the work for the device.
You need to close the electric circuit, turning the electric motor “on”.
Electric current travels through the brushes to the commutator.
The commutator transfers the electric current to the electromagnets
The electromagnets attract and repel with the permanent magnets.
Of the steps listed below, what step would happen "LAST" to get an electric motor to spin?
The armature and motor shaft spins and does the work for the device.
You need to close the electric circuit, turning the electric motor “on”.
Electric current travels through the brushes to the commutator.
The commutator transfers the electric current to the electromagnets
The electromagnets attract and repel with the permanent magnets.
