Magnetism and Electromagnetism
Flashcard
•
Science
•
8th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is magnetism?
Back
Magnetism is a physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects.
2.
FLASHCARD QUESTION
Front
What is an electromagnet?
Back
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.
3.
FLASHCARD QUESTION
Front
How can the strength of an electromagnet be increased?
Back
The strength of an electromagnet can be increased by increasing the current, using a stronger ferromagnetic core, or winding the coils closer together.
4.
FLASHCARD QUESTION
Front
What happens to magnetic field lines around a bar magnet?
Back
Magnetic field lines spread out from one pole of the magnet and curve around to the other pole.
5.
FLASHCARD QUESTION
Front
What are the Earth's magnetic poles?
Back
The Earth's magnetic poles are the points on the Earth's surface where the magnetic field is vertical.
6.
FLASHCARD QUESTION
Front
What is magnetic declination?
Back
Magnetic declination is the angle between magnetic north (the direction a compass points) and true north (the direction of the geographic North Pole).
7.
FLASHCARD QUESTION
Front
What device is used to measure electric current?
Back
A galvanometer is used to measure the current induced when a wire passes through a magnetic field.
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