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PS-21
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Primary Science Learning Experience
PS–21   Generating Electricity
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TRY THIS
Turn the crank slowly. Does the lamp light up? Turn it faster. Is the lamp brighter? Get a friend to turn the other crank as well.

WHAT IS HAPPENING
The turning crank rotates the copper-wire coils in a magnetic field in a dynamo (generator). This generates the voltage which drives a current through the bulb, there by lighting it up. The other generator is connected in parallel and supplies additional power to brighten the bulb further. The mechanical energy of the turning crank is converted to the electrical energy generated by the dynamo. The electrical energy is in turn converted to light and heat in the bulb.
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