Lesson: Alternating Current

In this lesson, we will learn how to identify alternating currents and calculate the properties of alternating currents.

Video

13:51

Q1:

Which of the following statements correctly describes what is meant by the term “alternating current”?

Q2:

The graph shows the current through a resistor over time.

At what time on the graph does the current change direction?

Q3:

The graph shows the current through an incandescent bulb over time.

How much time passes between each time the current changes direction?

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