- Why can’t magnetism be used as a source of energy?
- What is a short circuit?
- How does a battery work?
- Which is more likely to happen first: solar panels on every home, or giant solar power plants?
- Can sound be converted to useful energy?
- What’s the difference between AC and DC?
- How do birds sit on high-voltage power lines without getting electrocuted?
- Could we use exercise machines as energy sources?
- Which engine is better at high altitude: diesel or gasoline?
- What is “clean” coal?
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