To increase the brightness of a desk lamp, a student replaces a 50 W light bulb with a 100 W light bulb. Compared to the 50 W light bulb, the 100 W light bulb has \( \qquad \) (A) Less resistance and draws more current. (B) Less resistance and draws less current. (C) More resistance and draws more current. (D) More resistance and draws less current.
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The power \( P \) of a light bulb is given by the formula \( P = VI \), where \( V \) is the voltage and \( I \) is the current. Also, using Ohm's Law, \( V = IR \), where \( R \) is the resistance. Show more…
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QUESTION 6 1. A light bulb that has a resistance of 60 ohm and a light bulb that has a resistance of 80 ohm are connected in parallel through a 120 V power line. Determine which of the options is true. to. The 80 ohm bulb is brighter and draws the same current as the 60 ohm bulb. b. The 60 ohm bulb glows brighter and draws a higher current than the 80 ohm bulb. c. The 60 ohm bulb is brighter and draws the same current as the 80 ohm bulb. d. The 80 ohm bulb is brighter and draws more current than the 60 ohm bulb.
Supratim P.
Which answer is consistent with a replacement lightbulb that will increase the intensity (brightness) of the light in a room? (A) Use a lightbulb with less resistance, which restricts the current flow and results in a lower rate of energy dissipation. (B) Use a lightbulb with less resistance, which allows more current to flow and results in a higher rate of energy dissipation. (C) Use a lightbulb with less resistance, which allows more current to flow and results in a lower rate of energy dissipation. (D) Use a lightbulb with more resistance, which restricts the current flow and results in a lower rate of energy dissipation. (E) Use a lightbulb with more resistance, which allows more current to flow and results in a higher rate of energy dissipation.
Consider a $60.0 \mathrm{W}$ incandescent lightbulb and a $100.0 \mathrm{W}$ incandescent lightbulb designed for use in a household lamp socket at $120 \mathrm{V}$. (a) What are the resistances of these two bulbs? (b) If they are wired together in a series circuit, which bulb shines brighter (dissipates more power)? Explain. (c) If they are connected in parallel in a circuit, which bulb shines brighter? Explain.
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