Mini-Quiz: Hand Cranked Flashlight

1. How is the flashlight an electric machine?

   The electric motor turns the crankSorry, not correct. Try another button. The crank turns the generator to create electrical powerThat is correct. You know about electric machines. The LEDs create light energyGood try, but not right. Select another answer.

2. What do the gears inside the flashlight do?

   They make sure you don't turn the crank too fastOops! Wrong answer. Re-read the question and try again. They are used to hold the unit togetherSorry, not correct. Try another button. They increase the rotating speed turning the generatorCorrect. You understand flashlights.

3. Why is a battery included?

   To power the lights without having to use the crankThat is correct. You know about electric machines. No one is really sure about thatGood try, but not right. Select another answer. To help turn the generatorOops! Wrong answer. Re-read the question and try again.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.