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Power (w) = Volts (v) * Current (I)

I = P/V

100w bulb = 100/230 = 434mA

40w bulb = 40/230 = 174mA

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โˆ™ 2009-11-13 20:59:11
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Q: Would a 40 watt light bulb use less current than a 100 watt light bulb?
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Which has more resistance a 100 Watt light bulb or a 75 Watt light bulb?

A 75 watt light bulb has more resistance because less current is going through which causes less light.


How is the brightness of a light bulb determined?

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