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Mini-Quiz: Hand Cranked Flashlight

by Ron Kurtus (28 January 2016)

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

1. How is the flashlight an electric machine?

The electric motor turns the crank

The crank turns the generator to create electrical power

The LEDs create light energy

2. What do the gears inside the flashlight do?

They make sure you don't turn the crank too fast

They are used to hold the unit together

They increase the rotating speed turning the generator

3. Why is a battery included?

To power the lights without having to use the crank

No one is really sure about that

To help turn the generator

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

Understand how things work

Resources and references

Ron Kurtus' Credentials


Mechanically powered flashlight - Wikipedia

Electrical machine - Wikipedia

Electric machine - Wikipedia

Electromechanics - Wikipedia

Machines Resources


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