Is it possible to transfer Electricity without wires/Cables??

Question

Is it possible to transfer Electricity without wires/Cables??

Answer 1

YES!

Convert it into a laser beam and beam it to a receiver which will  reconvert it to electricity.

While other electromagnetic radiations can be used like gamma ray, ordinary visible light, infra- red ,or microwave, some factors must be considered.

Conversion of electrical energy to gamma rays will necessitate the use of particle accelerator which consumes a lot of energy to produce the gamma ray, thus tremendous amount of  energy is lost in the process. Also Gammas are too penetrating so that a directional gamma transmitter,  and receiver- re converter, may not be technically practical with our present technologies.

On the other hand ordinary visible light, infra-red, and microwaves incur diffusion (defraction) so that transmission of energy at long distances using these media will incur considerable energy loses.

Answer 2

Transfer "Electricity" without Wire/Cable is not possible.

Here we need to understand the term first. Electricity doesn't mean electric signals/pulse. It means voltage*current = power. current means follow of electrons. Which requires a conducting medium. Only conductors(copper wire, iron) can able to support for flow of current. Air is a pure insulator.

Many be due to heavy electric field (as in the case of lightning) charge may be transferred to the other object (to earth from clouds). But its only a fraction of secs. Not a continuous flow.

Answer 3

If by electricity, you mean electrical energy, then yes.

It can be transferred through electmagnetic waves (radio, microwaves, infrared, visible light, UV, gamma rays).

If you mean electric current, the answer is still yes.  

For example, a CRT monitor (the type people used before flatscreens) sends electrons through a vacuum by boiling them off a metal filament.  Electric current can be sent through a gas too.  Fluorescent lights work by sending a current through mercury vapor.

Answer 4

Yes, use an ordinary wireless extension cord. Available at K-Mart or mail order from here:-

http://www.thinkgeek.com/stuff/41/wec.sh...

Answer 5

Yes....It's called lightning.

Answer 6

If you read about Nikola Tesla you will see that he was trying to transmit electricity using high-frequency wireless toward the end of his career, and while working for Westinghouse he built a test plant in NY state.

More recently, I read about a company who has started making a device that transmits power within a house or office.