Find the energy given from a lightbulb

In summary, when comparing two light bulbs with different wattage ratings, the one with a higher wattage will use more energy during the same period of time. In this case, Bulb B with a rating of 100 Watts will use 4 times more energy compared to Bulb A with a rating of 25 Watts. The voltage difference of 120 volts is irrelevant in this scenario and was most likely included to confuse the reader.
  • #1
AnomalyCoder
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0

Homework Statement


You have two light bulbs: Bulb A is rated at 25 Watts and Bulb B is rated at 100 Watts. You plug it into a standard light socket that provides a voltage difference of 120 volts.
Which light bulb will use more energy during the same period of time? How many more?

Bulb A = 25 Watts
Bulb B = 100 Watts.

Homework Equations


Watts = Joules/Seconds

The Attempt at a Solution


Bulb A : 25 = Joules/10 seconds , you end up with 250 = x
Bulb B : 100 = Joules/10 seconds , you end up with 1000 = x
Bulb B, 4 times more energy.

The only questions I really have about this are:
Did I get the right solution?
Why was the voltage difference of 120 volts included in the problem for?
Is it just irrelevant information designed to trick an innocent student?
 
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  • #2
The only other reason I can think of giving you V= 120V is if you decide to compare the currents that each use. In which you will still get that bulb B uses more, since its power output is 100W.
 
  • #3
Oh that makes sense.
Thank you for the quick reply!
 

1. How is energy measured from a lightbulb?

The energy from a lightbulb is typically measured in watts (W) or kilowatts (kW). This measurement indicates the rate at which the lightbulb uses energy.

2. What factors affect the energy output of a lightbulb?

The energy output of a lightbulb can be affected by its wattage, efficiency, and the type of light it emits (such as incandescent, fluorescent, or LED).

3. Can the energy from a lightbulb be converted into other forms?

Yes, the energy from a lightbulb can be converted into other forms, such as heat or motion, through specific processes like thermoelectricity or photovoltaics.

4. How does the color of light affect its energy output?

The color of light does not directly affect its energy output, as energy is measured in watts regardless of the color. However, different colors of light can have different wavelengths and frequencies, which can impact how the light is perceived and how it affects objects it interacts with.

5. How does the energy output of a lightbulb compare to other common household appliances?

The energy output of a lightbulb can vary greatly depending on its wattage and type. Generally, it consumes less energy than larger appliances like refrigerators or air conditioners, but more than smaller devices like smartphones or laptops.

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