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Flashcards: Determine factors that affect electric and electromagnetic forces

Which of these materials lists could be combined to make an electromagnet?

a copper wire, a nail, and a battery

a piece of paper, a copper wire, and a hammer

a copper wire, a potato, and a hammer

a battery, a lightbulb, and an ice block

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Flashcards: Determine factors that affect electric and electromagnetic forces

Which of these materials lists could be combined to make an electromagnet?

Your answer:

a piece of paper, a copper wire, and a hammer

Your answer:

a copper wire, a potato, and a hammer

Your answer:

a battery, a lightbulb, and an ice block

Correct answer:

a copper wire, a nail, and a battery

Explanation:

The answer is "a copper wire, a nail, and a battery." The battery provides electricity which travels through the copper wire, and changes the alignment of the electrons in the iron nail, making it magnetic.

Magnetism is the force by which objects are attracted to or repelled by other objects. Magnets have two opposite ends, called poles. The north pole of one magnet will repel, or push away, the north pole of another magnet. The same thing will happen with two south poles. North and south poles of magnets are attracted to each other.

Magnetism involves electrons and electricity. Most iron is not permanently magnetic, but it can be made into a temporary magnet. The reason this is possible has to do with the electrons that make up the iron atoms. When the electrons are lined up just right, the piece of iron becomes a temporary magnet.

We call permanent iron magnets “Ferromagnetic,” but electricity is often used to make a type of magnet, called an electromagnet. Electromagnets are made from copper wire coiled around a core. Iron placed inside the core makes the magnet stronger. When an electric current is sent through the coiled wire, the wire becomes magnetized. When the current stops, the magnetism stops too.

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All Middle School Physical Science Resources

Flashcards: Determine factors that affect electric and electromagnetic forces

Flashcards: Determine factors that affect electric and electromagnetic forces

Flashcards: Determine factors that affect electric and electromagnetic forces

Flashcards: Determine factors that affect electric and electromagnetic forces

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