How the currernt in a superconductor is limited?

[djsourabh]

How the currernt in a superconductor is limited?

 

[Jiggy-Ninja]

By resistance or some other kind of load.

And if there isn't one, there's no limit.

 

[djsourabh]

By resistance or some other kind of load.

And if there isn't one, there's no limit.

You mean there is infinite current? that contradicts law of conservation of energy.

 

[Jiggy-Ninja]

You mean there is infinite current? that contradicts law of conservation of energy.

No it doesn't. If there's no load of any kind, there's no power being dissipated by the superconductor, so the current keeps climbing higher. The energy from the source is put into the kinetic energy of the electrons.

 

[djsourabh]

So do you know any formula for calculating amount of current through a superconductor?

 

[Dickfore]

A flowing current creates a magnetic field. The magnetic field cannot be larger than the critical magnetic field, because it destroys the superconducting phase.

 

[djsourabh]

What do you mean by critical magnetic field?

 

[Dickfore]

Have you ever heard about the Meissner-Ochsenfeld effect?

 

[djsourabh]

help!

 

[Dickfore]

what is your level of Physics education?

 

[djsourabh]

nothing about Q mechanics!
only know basic engineering physics.

 

[Dickfore]

do you know electromagnetism?

 

[djsourabh]

of course! law & applications in ac & dc machines!

 

[vk6kro]

The current is started by an external power source, so the current would remain the same as that which was originally induced in the superconductor.

It would not increase or decrease from that original value.

 

[Dickfore]

http://hyperphysics.phy-astr.gsu.edu/hbase/solids/scbc.html#c2