- Which engine is better at high altitude: diesel or gasoline?
- What is “clean” coal?
- Could we use exercise machines as energy sources?
- Why do the products of a nuclear fission reaction in uranium have three neutrons but not three protons?
- Is there a way to harness electricity from lightning?
- Why can’t fusion energy solve the global energy crisis?
- Can we use heat generated from an air conditioner or refrigerator?
- Which is more likely to happen first: solar panels on every home, or giant solar power plants?
- What is the energy of gasoline compared to the same cost of other fuels in BTUs per dollar?
- What’s the difference between fuel efficiency and fuel economy?
What happens to electricity when nothing is plugged into an outlet?
Like water on a closed valve, electricity exerts a pushing force on the outlet, but instead of being called pressure, it is called volts.By Deborah Halber
Electricity has some similarities to water, so to help understand this question, you can consider what happens to water when the valve is closed, says Kurt Broderick, a research specialist at the Microsystems Technology Laboratories. The electricity, like water on a closed valve, exerts a pushing force on the outlet, but instead of being called pressure, it is called volts.
When certain devices, such as standard incandescent lamps or can openers, are unplugged or off, there will be no flow (amps) moving through the outlet. “The electrons don’t move, any more than the water does when the taps on the sink are closed, and thus there is no work done,” Broderick says.
But not all electrical devices are dormant just because they are not performing their primary function. A microwave with a clock, for instance, uses as much power as a clock when it is plugged in, and a phone charger with a transformer is using a minute amount of electricity.
Posted: June 16, 2009