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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
Motor
B
Generator
C
Bar magnet
D
Electromagnet
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
Magnet
B
Motor
C
Car
D
Generator
4) __________at power plants produce electric energy for our homes.
A
Magnets
B
Electricity
C
Cars
D
Generators
5) Changes electrical energy to mechanical energy.
A
Car
B
Simple electric motor
C
Magnet
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
Mechanical
B
Chemical
C
Light
D
Sound
7) Surrounding a magnet is a __________________ that applies a force, a push or pull, without actually touching an object.
A
magnetic field
B
car
C
circuit
D
coil
8) A coil of wire spinning around a magnet or a magnet spinning around a coil of wire can form an _____________________.
A
motor
B
magnet
C
electric current
D
magnetic field
9) __________________ are huge wheels that rotate when pushed by water, wind, or steam (associated with generators)
A
Magnet
B
Car
C
Motors
D
Turbines
10) The opposite ends of a magnet are called_______________.
A
Left and right
B
East and west
C
North and south
D
Up and down
*select an answer for all questions
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