
Magnets and Electromagnets
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a magnet?
Back
A magnet is an object that produces a magnetic field, attracting certain materials like iron, nickel, and cobalt.
2.
FLASHCARD QUESTION
Front
What is an electromagnet?
Back
An electromagnet is a temporary magnet created by electric current flowing through a coil of wire.
3.
FLASHCARD QUESTION
Front
What is the main function of a generator?
Back
A generator converts mechanical energy into electrical energy.
4.
FLASHCARD QUESTION
Front
What is the role of a turbine in a generator?
Back
A turbine provides the mechanical force needed to spin the generator.
5.
FLASHCARD QUESTION
Front
What is an electric motor?
Back
An electric motor is a device that converts electrical energy into mechanical energy.
6.
FLASHCARD QUESTION
Front
What is direct current (DC)?
Back
Direct current is an electric current that flows in one direction only.
7.
FLASHCARD QUESTION
Front
What is alternating current (AC)?
Back
Alternating current is an electric current that reverses direction periodically.
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