How many joules of energy are supplied.

Joules/900 Coulombs= 30 Joules/coulomb. In summary, to find the total amount of electricity passing through the lamp, we multiply the current (5A) by the time (3 minutes), resulting in 900C. This amount of electricity is then converted into 27,000 joules of energy, meaning that each coulomb carries 30 joules of energy. The calculations provided in the attempt appear to be incorrect.
  • #1
AHUGEMUSHROOM
22
0

Homework Statement


How many coulombs of electricity pass through a lamp when a current of 5A flows for 3 minutes. Answer: 900C
In this time 27,000 joules of electrical energy is converted into heat and light. How many joules of energy are supplied by each coulomb.

Homework Equations


V=W/q
E=Pt
P=VI

The Attempt at a Solution


27000/900 = 30V
P=30 x 5 = 150W
E= 150 x 180 = 2700

Have I done this correctly?
 
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  • #2
Your first part is correct, not sure what you're trying to do with all those other equations listed though to calculate how much energy is supplied by each coulomb. It's a lot easier than what you're trying to do.
 
  • #3
one volt is one Joule/coulomb
 

1. How do I calculate the amount of joules of energy supplied?

To calculate the amount of joules of energy supplied, you can use the formula E = P x t, where E is energy in joules, P is power in watts, and t is time in seconds.

2. What is the SI unit for measuring energy?

The SI unit for measuring energy is the joule (J). Other commonly used units include calories (cal) and kilowatt-hours (kWh).

3. Can joules of energy be converted to other units?

Yes, joules of energy can be converted to other units such as calories or kilowatt-hours. There are conversion factors available for these conversions.

4. How does the amount of joules of energy supplied affect the amount of work done?

The amount of joules of energy supplied is directly proportional to the amount of work done. This means that the more joules of energy supplied, the more work is done.

5. How does the type of energy source affect the amount of joules supplied?

The type of energy source can affect the amount of joules supplied, as different sources have different energy densities. For example, a gallon of gasoline has a higher energy density than a gallon of water, therefore supplying more joules of energy.

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