Pardon me if this is a stupid question but my physics courses are from a long long time ago and I was a teenager back then. ;)
Electricity in a wire generates electromagnetism, right? Would it be possible to capture this EM field and use it as a power source or store in an accumulator?
Would that increase electrical consumption?
I thought that it would be great to get power from existing electrical wires (let's say there is a segment without insulation) without consuming any power from the electrical grid. However, if that would be the case then we surely would have seen some gadgets to that effect in the market, right?
I am also looking for a technical/physical/simple math explanation of why it can/cannot be possible to do so.