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What are 4 compents of a flash light?

Updated: 8/20/2019
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11y ago

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Generically, a power source (usually batteries), a light source (usually a light bulb), a switch to turn it on and off, and wiring of some sort to connect the energy source to the light source. Theoretically this is the minimum you would need to build a "flashlight".

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Q: What are 4 compents of a flash light?
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