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Worksheets25/26 Unit 1 Test Review
Total questions: 35
Worksheet time: 37mins
What can you do to make electromagnets stronger?
Increase number of coils of wire.
Increase number of batteries used.
Both A and B.
Neither A nor B.
A device that transforms electric energy to mechanical or kinetic energy is a
generator
motor
transformer
magnet
How are electromagnets different from permanent magnets?
magnets can be turned on/off
you can turn an electromagnet on/off
magnets are more powerful
magnets have a North and South pole
What is an electric circuit?
The path which the electric current takes.
The movement or flow of negatively charged electrons
The presence of electrons
An electric charge that collects or builds up on the surface of an object
In series circuit, there is only _____ path for electrons to flow.
One
Two
Three
Four
In parallel circuit, there are _________ pathways for charge to flow.
One
Two or more
None
Zero
Which one is the circuit diagram of this picture?
The picture shows an electrical circuit. This circuit is a series circuit because:
It has 3 light bulbs.
The same current flows through all three light bulbs.
It uses a single battery.
The electrical current is divided between the three light bulbs.
What will happen if one light bulb is removed from this circuit?
The other bulbs will go out.
The other bulbs will stay on
The other bulbs will get dimmer.
The battery will become stronger.
Can magnets interact without touching?
Yes
No
What will the magnets in the picture do?
Attract
Repel
Neither attract nor repel
Both attract and repel
A _____ is a device that has a magnetic needle that spins freely. It is used for navigation because its needle usually points north.
calculator
compass
GPS
map
Are the magnets in this picture attracting or repelling?
Attracting
Repelling
Magnets can be used to make electric motors and generators.
True
False
Which electromagnet is stronger?
A
B
Which electromagnet is stronger?
A
B
The picture shows a lamp. Which three forms of energy is the lamp using?
heat, light, and sound
electrical, light, and heat
mechanical, sound, and light
light, mechanical, and electrical
The blades of a wind turbine are at rest until the movement of air causes the blades to spin. Which energy transformation happens when the blades are spinning as shown?
Electrical to mechanical
Chemical to electrical
Mechanical to electrical
Chemical to mechanical
Electrical Energy
Electrical Outlet
Chemical Energy
Battery
Mechanical Energy
Movement
Thermal Energy
Heat
electric current can cause a magnetic field
true
false
a motor converts electrical current into
chemical energy
chemical force
mechanical force
mechanical life
electric generators converts mechanical force into
mechanical energy
magmatism
electric current
electric energy
true or false- motors and generators are opposites
true
false
