Question
The wattage marked on a lightbulb is not an inherent property of the bulb but depends on the voltage to which it is connected, usually 110 V or 120 V. How many amperes flow through a 60-W bulb connected in a 120-V circuit?
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This relationship can be expressed as: \[P = V \times I\] Show more…
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The wattage marked on a lightbulb is not an inherent property of the bulb, but depends on the voltage to which it is connected, usually 110 or 120 V. Part A: How many amperes flow through a 56-W bulb connected in a 110-V circuit?
A light bulb is marked as 60W 120V. How much current will pass through the bulb when it is connected to a 120V source? What is the resistance of the bulb?
The wattage rating of a lightbulb is the power it consumes when it is connected across a $120 \mathrm{~V}$ potential difference. For example, a $60 \mathrm{~W}$ lightbulb consumes $60.0 \mathrm{~W}$ of electric power only when it is connected across a $120 \mathrm{~V}$ potential difference. (a) What is the resistance of a $60 \mathrm{~W}$ lightbulb? (b) Without doing any calculations, would you expect a $100 \mathrm{~W}$ bulb to have more or less resistance than a $60 \mathrm{~W}$ bulb? Calculate and find out.
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