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WorksheetsMagnets and Magnetic Forces
Total questions: 43
Worksheet time: 22mins
Name
Class
Date
1.
What is a magnet?
a)
a substance that exhibits a property called magnetism
b)
the force of attraction or repulsion of substances, especially those that contain iron, due to the arrangement of their electrons
c)
a region in which the magnetic fields of individual atoms are lined up
d)
a device that uses an electromagnet to convert electrical energy into mechanical energy
2.
What is a magnetic domain?
a)
a region in which the magnetic fields of individual atoms are lined up
b)
the region around a magnet in which magnetic forces can act
c)
the force of attraction or repulsion of substances, especially those that contain iron, due to the arrangement of their electrons
d)
the part of the atmosphere affected by Earth’s magnetic field
3.
What is a magnetic field?
a)
the region around a magnet in which magnetic forces can act
b)
a region in which the magnetic fields of individual atoms are lined up
c)
a region in which the magnetic fields of individual atoms are lined up
d)
a substance that exhibits a property called magnetism
4.
What is a magnetic pole?
a)
the ends of a magnet
b)
a region in which the magnetic fields of individual atoms are lined up
c)
the region around a magnet in which magnetic forces can act
d)
a bar of iron wrapped with a coil of wire carrying an electric current
5.
What is magnetism?
a)
the force of attraction or repulsion of substances, especially those that contain iron, due to the arrangement of their electrons
b)
the study of technology devoted to developing and improving devices that use a flow of electrons
c)
the process by which electric current is produced by a changing magnetic field
d)
the process by which electric current is produced by a changing magnetic field
6.
What is a magnetosphere?
a)
the part of the atmosphere affected by Earth’s magnetic field
b)
the relationship between electricity and magnetism
c)
a region in which the magnetic fields of individual atoms are lined up
d)
the region around a magnet in which magnetic forces can act
7.
What is an electromagnet?
a)
a bar of iron wrapped with a coil of wire carrying an electric current
b)
the relationship between electricity and magnetism
c)
the process by which electric current is produced by a changing magnetic field
d)
the ends of a magnet
8.
What is electromagnetism?
a)
the relationship between electricity and magnetism
b)
the process by which electric current is produced by a changing magnetic field
c)
a bar of iron wrapped with a coil of wire carrying an electric current
d)
a device that uses an electromagnet to convert electrical energy into mechanical energy
9.
What is electromagnetic induction?
a)
the process by which electric current is produced by a changing magnetic field
b)
the study of technology devoted to developing and improving devices that use a flow of electrons
c)
a device that increases or decreases the voltage of alternating current
d)
the perfect conductivity shown by certain substances at extremely low temperatures
10.
What is a generator?
a)
a machine that converts mechanical energy into electrical energy
b)
an electronic device that increases the strength of an electric signal
c)
a device that increases or decreases the voltage of alternating current
d)
a device that uses an electromagnet to convert electrical energy into mechanical energy
11.
What is an amplifier?
a)
an electronic device that increases the strength of an electric signal
b)
a machine that converts mechanical energy into electrical energy
c)
a device that uses an electromagnet to convert electrical energy into mechanical energy
d)
a device that increases or decreases the voltage of alternating current
12.
What is an electric motor?
a)
a device that uses an electromagnet to convert electrical energy into mechanical energy
b)
a machine that converts mechanical energy into electrical energy
c)
an electronic device that increases the strength of an electric signal
d)
a device that increases or decreases the voltage of alternating current
13.
What is electronics?
a)
the study and technology devoted to developing and improving devices that use a flow of electrons
b)
force of attraction or repulsion of substances, especially those that contain iron, due to the arrangement of their electrons
c)
the process by which electric current is produced by a changing magnetic field
d)
a substance that exhibits a property called magnetism
14.
What is a transformer?
a)
a device that increases or decreases the voltage of alternating current
b)
an electronic device that increases the strength of an electrical signal
c)
a device that uses an electromagnet to convert electric signal
d)
a machine that converts mechanical energy into electrical energy
15.
What is a maglev train?
a)
a train that lifts off the tracks and uses superconductors as a power source
b)
a train that stays on the tracks and uses superconductors as a power source
c)
a train that lifts off the tracks and uses semiconductors as a power source
d)
a train that lifts off the tracks and uses semiconductors as a power source
16.
What is superconductivity?
a)
the perfect conductivity show by certain substances at extremely low temperatures
b)
the perfect conductivity show by certain substances at extremely high temperatures
c)
the perfect conductivity show by certain substances at extremely low electrons
d)
the perfect conductivity show by certain substances at extremely high temperatures
17.
As in the case of unlike magnetic poles, unlike electric charges ___________________?
a)
repel each other
b)
attract each other
c)
easily loses its magnetism
d)
strengthens the magnetic field
18.
Materials that allow the charges of an electric current to move freely through them are called ___________?
a)
conductors
b)
insulators
c)
electromagnet
d)
magnetic field
19.
Magnetic poles that are alike _________?
a)
repel each other
b)
attract each other
c)
stregthens magnetic field
d)
loses its magnetism
20.
The region around a magnet where the magnetic force is exerted is known as its ____________?
a)
magnetic field
b)
magnetic domain
c)
magnetic pole
d)
electromagnet
21.
One part of a freely swinging magnet always points ______________________?
a)
to Earth’s magnetic pole in the Northern Hemisphere
b)
to Earth’s magnetic pole in the Southern Hemisphere
c)
to Earth’s magnetic field in the Northern Hemisphere
d)
to Earth’s magnetic field in the Southern Hemisphere
22.
Magnetic poles that are unlike, do what?
a)
attract each other
b)
repel each other
c)
strenghthen the magnetic fieold
d)
loses its magnetism
23.
A temporary magnet does what?
a)
loses its magneitsm
b)
attracts each other
c)
repels each other
d)
strengthens the magnetic field
24.
The closer together a magnet’s magnetic field lines are, _____________?
a)
the stronger the magnetic field
b)
the more attracted they are to each other
c)
the more they repel each other
d)
the more it loses its magnetism
25.
A magnetic __________ is a grouping of billions of atoms that all have magnetic fields lined up in the same way
a)
domain
b)
field
c)
pole
d)
area
26.
A(n) _________________ is the region of magnetic force around a magnet.
a)
magnetic field
b)
magnetic domain
c)
magnetic pole
d)
electromagnet
27.
Earth’s magnetism is related to the circulation of molten material within Earth’s ________?
a)
core
b)
gravity
c)
air
d)
oceans
28.
An _______________ is a strong magnet that can be turned on and off.
a)
electromagnet
b)
temporary magnet
c)
superconductor
d)
electromagnet induction
29.
Each atom in a magnetic material acts as its own tiny magnet.
a)
true
b)
false
30.
The magnetic force is weakest at the poles of a magnet.
a)
false
b)
true
31.
Earth’s magnetic field DEFLECTS charged particles that stream toward Earth from the sun and helps protect life on this planet.
a)
false
b)
true
32.
Some birds use Earth’s magnetic field to help them navigate during migration.
a)
truw
b)
flase
33.
The role of a turbine in producing electricity is to move the magnet inside a generator.
a)
false
b)
true
34.
What is a magnetic domain?
a)
A region in which the magnetic fields of individual atoms are lined up
b)
the region around a magnet in which magnetic forces can act
c)
The part of the conductivity shown by certain substances at extremely low temperatures
d)
the process by which electric current is produced by a changing magnetic fields
35.
What is a transformer?
a)
A device that increases or decreases the voltage of alternating current
b)
A machine that converts mechanical energy into electrical energy
c)
An electronic device that increases the strength of an electric signal
d)
A device that uses an electromagnet to convert electrical energy into mechanical energy
36.
What is a magnetsophere?
a)
The part of the conductivity shown by certain substances at extremely low temperatures
b)
A bar of iron wrapped wir a coil of wire carrying an electric current
c)
The process by which electric current is produced by a changing magnetic field
d)
A device that uses an electromagnet to convert electrical energy into mechanical energy
37.
What is an electromagnet?
a)
A bar of iron wrapped wire a coil of wire carrying an electric current
b)
The ends of a magnet
c)
An electronic device that increases the strength of an electric signal
d)
The process by which electric current is produced by a changing magnetic fields
38.
What are the ends of a magnet called?
a)
magnetic pole
b)
magnetic field
c)
magnetic domain
d)
electric motor
39.
What is the region around a magnet in which magnetic forces can act
a)
magnetic field
b)
magnetic domain
c)
magnetic pole
d)
electric motor
40.
What is a device that uses an electromagnet to convert electrical energy into mechanical energy
a)
electric motor
b)
transformer
c)
generator
d)
amplifier
41.
What is a machine that converts mechanical energy into electrical energy
a)
generator
b)
transformer
c)
amplifier
d)
electric motor
42.
What is an electronic device that increases the strength of an electric signal?
a)
amplifier
b)
generator
c)
transformer
d)
electric motor
43.
What is the process by which electric current is produced by changing magnetic fields?
a)
electromagnet induction
b)
electronics
c)
generator
d)
electromagnet
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