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To increase the brightness of a desk lamp, a student replaces a 50-watt incandescent lightbulb with a 100-watt incandescent lightbulb. Compared to the 50-watt lightbulb, the 100-watt lightbulb has (1) less resistance and draws more current (2) less resistance and draws less current (3) more resistance and draws more current (4) more resistance and draws less current

William Cain

in Physics

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Melissa Norris on September 9, 2018

From the formula for Power, P = IV, P = V2/RSo of the 100W compared to the 50W.From P = IV. From the equation there is a direct relationship between the P and the I. More P Power means more Current, I. since P = V2/R. From the equation, there is an inverse relationship between P and R. thus, more P means a lower R. Thus, from these statements, the answer is: (1) less resistance and draws more current


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