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Mini-Quiz: Alternating Current (AC) Electricity

by Ron Kurtus (revised 2 June 2009)

Take this Mini-Quiz to check your understanding of the lesson material.

1. Why is it called alternating current?

The current alternates in direction within the wire

The current alternates between on and off

The current alternates between AC and DC

2. What does an electrical transformer do?

It changes the direction of AC electricity

It changes the voltage of DC electricity

It changes the voltage of AC electricity

3. For what is a combination of a capacitor, inductor, and resistor used?

It is used for tuning your radio

It changes AC to DC

It changes the frequency from 50Hz to 60Hz

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.

Electrify society by applying your knowledge of science

Resources and references

Ron Kurtus' Credentials

Web sites

Elements of AC Electricity - Basic electronics tutorial site

Alternating Current - Overview of AC

DC and AC Electricity Resources

Physics Resources


Top-rated books on Basic Electricity

Top-rated books on AC Electricity


This lesson selected by the SciLinks program, a service of National Science Teachers Association.

SciLinks award

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