Ontario Grade 9 Science Practice Exam 2025 – Complete Study Resource

Question: 1 / 400

What does an ammeter measure?

Electric current.

An ammeter is a device used to measure the electric current flowing through a circuit. Therefore, options B, C, and D are incorrect because they do not pertain to the purpose of an ammeter. Option B discusses the measurement of atomic mass, which is completely unrelated to electric current. Option C talks about measuring the distance between the sun and orbiting objects, which is a task for devices such as telescopes and satellites. Option D mentions measuring the number of protons in an atom's nucleus, which is typically done using a special type of spectroscope. Thus, the correct answer is A, as an ammeter specifically measures electric current.

Get further explanation with Examzify DeepDiveBeta

The mass of an atom.

The distance between the sun and orbiting objects.

Protons in an atom's nucleus.

Next Question

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy