- Is it possible to collect energy from a moving roller coaster?
- Which is more likely to happen first: solar panels on every home, or giant solar power plants?
- Can we use heat generated from an air conditioner or refrigerator?
- How can solar cells become cost-effective enough to be commercially viable?
- Can sound be converted to useful energy?
- Could we use exercise machines as energy sources?
- How do birds sit on high-voltage power lines without getting electrocuted?
- Is it possible to construct a perpetual motion machine?
- Why can’t magnetism be used as a source of energy?
- Why can’t fusion energy solve the global energy crisis?
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