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<blockquote data-quote="skomedal" data-source="post: 982304" data-attributes="member: 280388"><p>Thanks Mr Tesla</p><p></p><ol> <li data-xf-list-type="ol">A current that runs through a wire creates a magnetic field around that wire. An alternating current in a wire creates an electromagnetic field around that wire.<br /> <br /> </li> <li data-xf-list-type="ol">Yes, you can capture that electromagnetic field. This is how an antenna works: The signal is sent by having an alternating current run up and down the antenna, and the resulting field can then induce a current in another wire (the receiving antenna). You could, theoretically, use that current to light a bulb or some such thing.<br /> <br /> </li> <li data-xf-list-type="ol">So in principal you could use that to receive and store power. I believe that this is what Nikola Tesla had in mind when he wanted to find a system that could transmit energy wireless.<br /> </li> </ol><p>Two things, however. First, the EM field doesn't come for free. You'd still need the power plant to generate the alternating current. Second, this method of transmission is very inefficient. To receive any appreciable amount of power, the initial signal/current has to be ridiculously high. Think about it this way: Your microwave takes current from the wire and converts it into EM radiation to cook your chicken. Now imagine you wanted to send the same power to the microwave via an EM field. That field would need to have at least the same power as the one you put in your chicken, but that'd mean you'd cook everything else around you too <img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /></p><p></p><p><a href="http://physics.stackexchange.com/questions/58004/is-it-possible-to-get-energy-from-electrical-wire-using-induction" target="_blank">Is it possible to get energy from electrical wire using induction?</a></p><p></p><p>Bit tongue in cheek observation <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite14" alt=":-doh" title="DOH! :-doh" loading="lazy" data-shortname=":-doh" /></p><p></p><p>Regards</p></blockquote><p></p>
[QUOTE="skomedal, post: 982304, member: 280388"] Thanks Mr Tesla [LIST=1] [*]A current that runs through a wire creates a magnetic field around that wire. An alternating current in a wire creates an electromagnetic field around that wire. [*]Yes, you can capture that electromagnetic field. This is how an antenna works: The signal is sent by having an alternating current run up and down the antenna, and the resulting field can then induce a current in another wire (the receiving antenna). You could, theoretically, use that current to light a bulb or some such thing. [*]So in principal you could use that to receive and store power. I believe that this is what Nikola Tesla had in mind when he wanted to find a system that could transmit energy wireless. [/LIST] Two things, however. First, the EM field doesn't come for free. You'd still need the power plant to generate the alternating current. Second, this method of transmission is very inefficient. To receive any appreciable amount of power, the initial signal/current has to be ridiculously high. Think about it this way: Your microwave takes current from the wire and converts it into EM radiation to cook your chicken. Now imagine you wanted to send the same power to the microwave via an EM field. That field would need to have at least the same power as the one you put in your chicken, but that'd mean you'd cook everything else around you too :) [URL="http://physics.stackexchange.com/questions/58004/is-it-possible-to-get-energy-from-electrical-wire-using-induction"]Is it possible to get energy from electrical wire using induction?[/URL] Bit tongue in cheek observation :-doh Regards [/QUOTE]
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