2023
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the power of a 3V light bulb with 20 A running through it?
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0.15W
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6W
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60W
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6.67W
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Explanation:
Detailed explanation-1: -Voltage: 3V; Wattage: 0.13w; Base Type: E27.
Detailed explanation-2: -P=IV=(VR)V=V2R. This gives the power in terms of only the voltage and the resistance.
Detailed explanation-3: -For a typical incandescent bulb, lightbulb voltage is around 110 Volts, designed to match the voltage produced by a common electrical outlet. Typical lightbulb wattage (the amount of energy produced) is around 60 Watts.
Detailed explanation-4: -"A 60-watt incandescent bulb uses 60 watts of energy; we bill for energy in kilowatt hours which is 1, 000 watts continuously for 1 hour. So, a 60-watt bulb uses 60 watts hours or . 06 kilowatt hours of energy for each hour it’s on.
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