can electricity be transmitted through radio waves so person in remote place can get his batteries recharged.?

Answer 1

The answer is yes, but its not an efficient process.

Nikola Tesla wanted to create free power transmitting stations and actually built some lower powered units as a proof of concept.

Fact of the matter is though, the energy transmission is VERY inefficient. As you get further and further away from the transmitter, the power drops off.

For example, radio works on this principle, but instead of charging a battery, a very weak signal is amplified (copied) and then used to drive a set of speakers. The signal that a normal radio can pick up is on the order of 50-1000 microwatts. However, most FM transmitters put out killowatts (usually about 100 kW)

source:
http://www.google.com/search?hl=en&lr=&safe=off&q=commercial+FM+kw

Anyway, you get the idea, the power is mostly wasted. Its ok for communicating some information, but for charging batteries, generally not.

However, you can get some energy from it, but the energy output will be better the closer you are to the transmitter.

A more efficient way of moving power is to do it with electric fields ("near fields") rather than RF. This is how a transformer works:
http://en.wikipedia.org/wiki/Transformer

Power can be transmitted, but its not efficent to be remotely practical. Megawatts would be lost over 10s of miles just to get a watt or milliwatt out of it.

Heres more about Tesla - interesting reading:
http://en.wikipedia.org/wiki/Nikola_Tesla

And while it doesn't mention RF transmission, this article on power transmission should be interesting to you (I thought it was cool):
http://en.wikipedia.org/wiki/Electrical_power_transmission

Answer 2

A radio wave is a form of electromagnetic energy. On the receiver end if you pass this engery through a transformer you can either increase the voltage/decrease the current or decrease the voltage/increase the current.

Now the frequency of a radio wave much higher than the standard 60 Hz line frequency of your house. So the frequency has to be divided. This is normally done by converting it to a digital signal and using digital frequency dividers. So the steps involved are:

1. Transmit a signal at a an FCC compliant frequency and power
2. Use an analog to digital converter
3. Use a frequency divider circuit
4. Use a digital to analog frequency converter
5. Use a torroid transformer to amplify the current
5. Convert the signal to DC
6. Use a voltage multiplier circuit
7. Use a transformer to drop the voltage thus increasing the current further
8. At this point the theoretical output would be 120v at 15A

For practical wireless applications the circuity could be adjusted to just charge batteries.

Or you could just use a solar cell.

Answer 3

that's one hundred% accessible to deliver potential via Electromagnetic waves and that's being performed, even with the undeniable fact that that's extra undertaking than that's well worth for shopper desires for various motives. first of all, the frequency could desire to be someplace around 60-one hundred GHz. Secondly, the quantity of potential mandatory on the transmitter could be astronomical to ensure that the wave to no longer attenuate to 0 after some meters. 0.33, this quantity of potential could reason unfavorable consequences on the human physique, could desire to somebody hinder the beam. those, as i discussed, are no longer feasable for family individuals applications, yet there are various applications being researched. the finest is the powering of zeppelins from the floor. In Japan there is an array of fifty+ satellite tv for pc dishes that beam sixty 5 GHz potential beams as much as a zeppelin interior the midsection troposphere.

Answer 4

I think Brett's answer to your question is good, but if you want a sloution to that problem, I'd buy a wind mill or something that uses natural energy.

Answer 5

Concentrate and ask again.

Answer 6

No.