1 wire power transmission using coils.

[pete20r2]

Hello Physicists,
I am doing my final year of High School in Australia and our current topic is magnetism and related fields.

Physics is my favorite subject after maths and I tend to query a lot of things.

Here is my basic Idea:

My basic instinct tells me that the orange wire must be a loop, so a current can be induced in it. If not, what are the comparisons between this wire and an Antenna?

 

[cragar]

I don't think you would need it to be a loop. The changing B field will push the electrons in the orange wire . It will be similar to producing a hall voltage in a conductor moving in a B field.

 

[pete20r2]

"hall voltage in a conductor moving in a B field."
I did not understand any of that, can you please elaborate?

 

[sophiecentaur]

There would be no current induced in a wire that runs along the axis of one coil because the fields aren't in the right direction, I'm afraid.

 

[cragar]

My bad. Is this because the induced E field is in the phi direction.

 

[pete20r2]

Are you messing with me, I say I do not understand, and you say something more complex.

 

[cragar]

No I am not messing with you. the Ac current in the first loop will create a B field in the direction of the orange wire . And a changing B field will induce an E field . This induced E field will be in the direction of the current in a circular direction around the orange wire and won't cause electrons to flow in the orange wire. My first post was wrong. Maybe coil
the orange wire inside the black wire like a transformation then it will push the electrons.

 

[pete20r2]

So will something like this work:

 

[cragar]

Yes i think that would work .

 

[sophiecentaur]

Are you messing with me, I say I do not understand, and you say something more complex.

The word "no" isn't complex. The reason why not, however, may be. Some of these questions don't have easy answers and there may be no point in looking for one.

 

[sophiecentaur]

So will something like this work:

If you connected each end of the green coils together then you'd effectively have two transformers. Sling in some laminatediron cores to increase the magneticic fields and you would be describing the usual arrangement - which works,

 

[pete20r2]

I only want 1 wire to connect the two systems, that is the only condition.

 

[sophiecentaur]

So the least complex answer has to be NO.
E X C E P T if you use a high enough frequency, in which case you will have two loop antennae (the two red coils) so you may as well throw away the green ones and your single wire.
All this electromagnetic stuff works because of the angles between currents, electric fields and magnetic fields. Coils in the same plane or with their planes parallel will couple because the magnetic fields of each will 'coincide'. etc. etc.

 

[pete20r2]

ok, thankyou.