How does a hand crank flashlight work?

Answer by  Desine (427)

It works like any flashlight, where a battery is connected to a lightbulb. The hand crank is a simple generator; turning the dynamo (a magnet surrounded by coils of wire) generates an electric current, which can light the bulb directly or (more commonly) charge up the battery for later use.

Answer by  KWags1977 (427)

The idea behind the crank flashlight uses magnetic induction, which uses the motion of a magnet to create an electrical charge. This is how you get stored up energy/light.

Answer by  embockjr (709)

A hand cranked flashlight works by means of a hand powered generator that provides voltage/current to charge a system that will then provide current to a flashlight bulb.

Answer by  Allstar (2071)

The hand crank drives a small DC electric generator. When turned, the motor generates electricity which charges the batteries. Other than that, it works exactly like any other flashlight.

Answer by  AnnArk (141)

The primary scientific principle behind this ingenious and eco-friendly device is the principle of magnetic induction which uses the motion of a magnet to create an electrical charge.

Answer by  ladybud (1069)

The small electric motor inside is hand cranked.Electro magnetic friction cause's Electric.Any Electric motor can produce electric.Simular to kid's car's when you push them they light up with no battery's.

Answer by  LeheckaG (1826)

A hand crank turns an or electric generator or magneto (typically a permanent magnet and a coil of wire), which then charges a rechargeable battery or storage capacitor. Usually a low power lamp bulb is used to make the resulting charge illuminate the light longer before the hand crank needs to be turned again.

Answer by  SimonLC (234)

The crank that exists in the lamp is connected to a dynamo. As you rotate the crank is a transformation of mechanical energy into electricity. With this if it recharges the batteries and you can use the flashlight for a long time without getting the spinning crank.

Answer by  JG (39)

A hand crank flashlight is powered by the physical act of turning the crank. Cranking the flashlight charges it up and provides you with several minutes of light without batteries.

Answer by  Anonymous

You turn the crank, and light happens.

Answer by  brandenpal123 (1)

umm let me think with the crank