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Mini-Quiz: Background of Worldwide AC Voltages and Frequencies

by Ron Kurtus (revised 3 February 2017)

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

1. Who is credited with initiating the use of AC electricity?



AEG company

2. What is an advantage of using 50Hz over 60Hz?

60Hz can cause an audible hum in appliances

50Hz allows clocks to run at 50 minutes per hour

60Hz requires higher voltages than 50Hz

3. How can you change the setting in a dual voltage device?

There is a switch that indicates 120V or 240V

You can't change the voltage

You must plug in a converter or transformer

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.

Work smart

Resources and references

Ron Kurtus' Credentials


Utility frequency - Wikipedia

Mains electricity - Wikipedia

World Standards - Electricity standards

DC and AC Electricity Resources

Physics Resources


Top-rated books on Electric Power Systems

Top-rated books on Electric Transformers

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