Electric and Magnetic Forces Review
Flashcard
•
Science
•
7th Grade
•
Hard
Wayground Content
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15 questions
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1.
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. It consists of a coil of wire, often wrapped around a magnetic core.
2.
FLASHCARD QUESTION
Front
How can you increase the strength of an electromagnet?
Back
You can increase the strength of an electromagnet by increasing the number of coils, using a larger magnetic core, using thicker wire, or increasing the voltage of the power source.
3.
FLASHCARD QUESTION
Front
What is static electricity?
Back
Static electricity is the buildup of electric charges on the surface of an object. It occurs when there is an imbalance between positive and negative charges.
4.
FLASHCARD QUESTION
Front
Which materials are magnetic?
Back
Magnetic materials include iron, cobalt, and nickel. Aluminum is NOT magnetic.
5.
FLASHCARD QUESTION
Front
What is the role of a magnetic core in an electromagnet?
Back
The magnetic core enhances the magnetic field produced by the coil of wire, making the electromagnet stronger.
6.
FLASHCARD QUESTION
Front
What happens when an electric current flows through a wire in a magnetic field?
Back
When an electric current flows through a wire in a magnetic field, it experiences a force that can cause it to move, which is the principle behind electric motors.
7.
FLASHCARD QUESTION
Front
What is the difference between an open circuit and a closed circuit?
Back
An open circuit has a break in the path, preventing current from flowing, while a closed circuit allows current to flow continuously.
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