Physics Review Question Unit: Electricity Year: 1997 Question#: 31 Question: To increase the brightness of a desk lamp, a student replaces a 60-watt light bulb with a 100-watt bulb. Compared to the 60-watt bulb, the 100-watt bulb 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 What is this question really asking? Explanation by: Raphael D [ Return to question menu ] Answer 1 less resistance and draws more current CORRECT This is the correct answer because by replacing the 60-watt bulb with a 100-watt bulb there would be less resistance and more current would be drawn. This would make the brightness of the desk lamp increase. This is really based on your understanding of Ohm's law, V=IR
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