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Electromagnets, Generators, And Simple Electric Motors
Test Description: Answer questions on electromagnets, generators, and simple electric motors.
Instructions: Answer all questions to get your test result.
1) Formed when a wire in an electric circuit is wrapped around an iron core producing a magnetic field
A
Electromagnet
B
Bar magnet
C
Generator
D
Motor
2) True or False: An electromagnet loses its magnetism if the electric current stops flowing
A
True
B
False
3) Produces an electric current when a coil of wire wrapped around an iron core is rotated near a magnet
A
Generator
B
Motor
C
Car
D
Magnet
4) __________at power plants produce electric energy for our homes.
A
Electricity
B
Generators
C
Cars
D
Magnets
5) Changes electrical energy to mechanical energy.
A
Simple electric motor
B
Magnet
C
Car
D
Generator
6) In a simple electric motor, like poles of the magnets repel and unlike poles of the magnets attract. This causes the coil to rotate and thus changes electrical energy to ________________energy
A
Sound
B
Chemical
C
Light
D
Mechanical
7) Surrounding a magnet is a __________________ that applies a force, a push or pull, without actually touching an object.
A
circuit
B
magnetic field
C
car
D
coil
8) A coil of wire spinning around a magnet or a magnet spinning around a coil of wire can form an _____________________.
A
magnet
B
motor
C
magnetic field
D
electric current
9) __________________ are huge wheels that rotate when pushed by water, wind, or steam (associated with generators)
A
Turbines
B
Motors
C
Magnet
D
Car
10) The opposite ends of a magnet are called_______________.
A
Left and right
B
Up and down
C
North and south
D
East and west
*select an answer for all questions
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