The initial cost of the LED bulb is high, but the cost to the home owner will be $0.69 for the incandescent bulbs versus $0.44 for the LED bulbs per year. (Note that the LED bulbs are coming down in p...The initial cost of the LED bulb is high, but the cost to the home owner will be $0.69 for the incandescent bulbs versus $0.44 for the LED bulbs per year. (Note that the LED bulbs are coming down in price.) The cost savings per year is approximately $8.50, and that is just for one bulb.
Electric energy depends on both the voltage involved and the charge moved. Electric power ( P ) is simply the product of current times voltage. Power has familiar units of watts. Since the SI unit fo...Electric energy depends on both the voltage involved and the charge moved. Electric power ( P ) is simply the product of current times voltage. Power has familiar units of watts. Since the SI unit for potential energy (PE) is the joule, power has units of joules per second, or watts.
Electric energy depends on both the voltage involved and the charge moved. Electric power ( P ) is simply the product of current times voltage. Power has familiar units of watts. Since the SI unit fo...Electric energy depends on both the voltage involved and the charge moved. Electric power ( P ) is simply the product of current times voltage. Power has familiar units of watts. Since the SI unit for potential energy (PE) is the joule, power has units of joules per second, or watts.
