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WorksheetsChapter 7 - Magnetism
Total questions: 20
Worksheet time: 10mins
What can you refer to as magnetism?
Something to deal with electrons
Attract or repel
the properties and interactions of magnets
anything to exert forces
What happens if you put similar poles?
attract
repel
neither of them
break apart
The Earth's magnetic field is aligned with the needle on the compass.
true
false
Which of the following materials is magnetic?
Iron (Fe)
Cobalt (Co)
Nickel (Ni)
All of the above
What are those groups of atoms with aligned magnetic poles called?
magnetic field
magnetic poles
magnetic domains
magnetism
If you break a magnet in half, it will all have one pole.
True
False
If you wrapped a single wire into a cylindrical wire, it would be called:
solenoid
spring
spiral
circle
What would happen if the distance between two magnets were farther apart?
The magnetic force gets stronger
The magnetic force stays the same
all of the above
The magnetic force gets weaker
If the current of the wire is increased, then the magnetic field gets strong.
True
False
How is an electromagnet developed?
If it became demagnetized
Once electricity and magnetism are combined
When there is a current in a wire coil
By zapping a magnet
To measure electric current with an electromagnet, what tool should you use?
The thermometer
A galvanometer
An electroscope
A stopwatch
An electric motor changes mechanical energy into thermal energy.
True
False
In a simple electric motor, what are the main parts?
A source, receiver, and a pathway
A wire coil, a permanent magnet, and a current source.
Brushes and a commutator
Lemon juice, metals, wires, and a radio.
Define electromagnetic induction.
the result of electrons flowing from one surface to another
A thing that flows in a single direction
Something that reduces electric current
the generation of an electric current by a changing magnetic field
When you increase the electromagnetic field, you either add more turns of the wire to the solenoid or improve the current in the wire.
True
False
How does a generator transform mechanical energy into electrical energy?
spinning the motor
Using electromagnetic induction
operate electronics
power up trains
What are generators used in vehicles called?
Shock absorber
magnet
Alternators
charger
A turbine is used to cool themselves down
True
False
What is a transformer?
A robot that transforms to a vehicle
Something that changes
a deep learning architecture
A device that changes the voltage of an alternating current
What is the difference between a step-down transformer and a step-up transformer?
A step-down transformer decreases voltage, while a step-up transformer increases the voltage.
A step-down transformer increases voltage, while a step-up transformer decreases the voltage.
They have the same function
Neither of them
