4
QuizMultiple Choice

Fundamental Forces — Quiz

Question 4 • Physical Science

Which is an example of the electromagnetic force?

Answer
A
A compass needle points north toward Earth’s magnetic pole.
B
An iron nail rolls off a table and falls to the ground.
C
Protons that make up a nitrogen atom stay together in the nucleus.
D
The moon pulls on the water in Earth’s oceans, causing tides.

Explanation

The electromagnetic force includes magnetism, so it explains why a compass needle aligns with Earth’s magnetic field and points toward the magnetic pole. The falling nail and ocean tides are caused by gravity, while the force holding protons together in a nucleus is the strong nuclear force. Therefore, the compass needle is the example of the electromagnetic force.

AI-written and checked against the verified answer.

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