2006-07-29 14:23:52 · 5 answers · asked by bimalxp 1 in Science & Mathematics ➔ Physics
i want to know that whether the normal electricity, as used in home appliances, can be sent wirelessly or not till date. is any research going on this field?
2006-07-30 15:41:21 · update #1
A radio wave is an example of wireless electricity. The transmitter creates an electromagnetic wave which arrives at a radio antenna and creates a voltage across it, which causes a current to flow in the antenna. This signal is decoded by the radio.
Another example: If you were able to hold a fluorescent bulb next to a transmitter antenna radiating more than a few watts of power, the bulb would glow without any wires.
The *trouble* with wireless electricity is that you need some way to "point" it, else it goes off in all directions. A Japanese gentleman was working on that problem when he invented the Yagi-Yuda antenna. Turned out to be very useful for picking up television signals.
2006-07-30 01:25:16 · answer #1 · answered by Luis 4 · 0⤊ 0⤋
wireless electricity is basically the same thing as sending/receiving radio waves. just the the sender and receiver are just centimeters apart. A coil placed in an electromagnetic field will start producing electricity.
2006-07-29 21:32:55 · answer #2 · answered by the redcuber 6 · 0⤊ 0⤋
Lightning.
By the way, radio waves etc. are not really wireless
electricity as electric current must be generated by
charged particles.
2006-07-30 00:23:45 · answer #3 · answered by PoohP 4 · 0⤊ 0⤋
That would have to be a pretty concentrated beam of UV or even gamma rays to power anything useful. I've never heard of this concept.
2006-07-29 21:29:24 · answer #4 · answered by Steve S 4 · 0⤊ 0⤋
Go to Amazon see books on N.Tesla.
I can't do the answer more justice than this.
2006-07-29 21:28:47 · answer #5 · answered by LeBlanc 6 · 0⤊ 0⤋