Ontario Grade 9 Science Class Practice Exam

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What is current electricity?

  1. Static charge in an object

  2. Natural flow of electrons in the environment

  3. Controlled flow of electrons through a conductor

  4. Uncontrolled flow of electrons in a conductor

The correct answer is: Controlled flow of electrons through a conductor

Current electricity refers to the controlled flow of electrons through a conductor. This means that the rate at which electrons move through the conductor is controlled by an external source, such as a battery or power supply. Option A is incorrect because it refers to static charge, which occurs when there is a buildup of electric charge in an object. This does not involve the flow of electrons. Option B is incorrect because it refers to the natural flow of electrons in the environment, which is not controlled by an external source. Option D is incorrect because it describes an uncontrolled flow of electrons in a conductor, which can be dangerous and is not the definition of current electricity.

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