Wireless Electricity

Yes, but only over short distances, think about wireless chargers for phones and toothbrushs. Over longer distances its possible but inefficient.
 
The convenience of not having the wires, however, does come at a price. While it is true that conduction loss in conventional copper wired connection is not negligible, losses in WPT is much worse. In order to generate strong enough magnetic field to couple two separated coils, a large alternating current is needed. As we know, circulating current in conducting material (other than superconductor) generates conduction loss. Therefore, the further the separation distance between the two coils in WPT is, the larger magnitude of current is needed to generate enough magnetic field, and the lossier the whole system becomes. Not only that, for real world application, the transmitting coil not only sends energy to the other coil, but also to any other metallic object that happens to be nearby.

The current state of the art for high power system with relatively short separation such as for vehicle charging has the efficiency of 97%. [1] On the other hand, a system for high separation, for example - 5 times the radius of the coil, such as demonstrated by a group at MIT in 2007 only has the efficiency of 53%. [2] And that is already at the limit of what efficiency we can physically get from metal conductor at room temperature.​
 
Ahhh mate. Thanks for your answers. It was a bit of a leading question, sorry.
But really quoting some student’s coursework ain’t the best reference.
I think you maybe need to up your research game.

In my opinion the technology to safely transmit electricity over distance has been known about since early last century.
Only now are we starting to see the release of this technology.
 
mac said:
Ahhh mate. Thanks for your answers. It was a bit of a leading question, sorry.
But really quoting some student’s coursework ain’t the best reference.
I think you maybe need to up your research game.

In my opinion the technology to safely transmit electricity over distance has been known about since early last century.
Only now are we starting to see the release of this technology.
Click to expand...
Wireless energy has been around for ages, satellites use it to beam your sky tv.
I'm not convinced that it works well enough to be useful beyond applications that we already have with wireless charging, but who knows.
If you do come across any new developments Id like to read about them. 👍🏻
 
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'Broadcast power' has been a staple of sci-fi since the 50s, perhaps even earlier. The idea that electrical power could be transmitted in sufficient quantity, over sufficient distance to power some thing useful such as a car, does not seem possible given our knowledge of physics on a macro level.

We would need some serious new technology to even start to make that a reality.

Getting a radio signal from one side of the world to the other is child's play by comparison.
 
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