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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
Bar magnet
B
Electromagnet
C
Motor
D
Generator
2) True or False: An electromagnet loses its magnetism if the electric current stops flowing
A
False
B
True
3) Produces an electric current when a coil of wire wrapped around an iron core is rotated near a magnet
A
Car
B
Motor
C
Magnet
D
Generator
4) __________at power plants produce electric energy for our homes.
A
Magnets
B
Generators
C
Electricity
D
Cars
5) Changes electrical energy to mechanical energy.
A
Generator
B
Magnet
C
Car
D
Simple electric motor
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
Light
C
Sound
D
Chemical
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
electric current
C
motor
D
magnetic field
9) __________________ are huge wheels that rotate when pushed by water, wind, or steam (associated with generators)
A
Magnet
B
Car
C
Turbines
D
Motors
10) The opposite ends of a magnet are called_______________.
A
East and west
B
Up and down
C
Left and right
D
North and south
*select an answer for all questions
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