A small superconducting puck (diameter approximately 25 mm) with a field of 17 tesla would not be easy to make. The puck has to be put inside a large electromagnet capable of generating this field and then cooled to a temperature of about 29 K or less to freeze the field lines in. The puck...
Superconducting wire will carry much larger currents than normal copper wire but if it's tightly wound the size of the current will be limited by the magnetic field around the wire. The best approach would be to magnetise a small puck of superconducting material like YBCO. Fields as high as 17...
Electrical resistance is due to electrons colliding with the atoms of the conductor. In a magnetic circuit reluctance is analogous to resistance in an electric circuit. Just as resistance impedes the flow of electrons in an electric circuit, reluctance impedes the flux in a magnetic circuit but...
R is a solid loop and flux (BA) flows through R. C is a second loop which branches off from R, loops around and is connected to P. P is free to rotate so the the point S can move around on the surface of R. R is a superconducting ring. What we have is a superconducting surface with two holes...
What you have said is perfectly correct. If P is left to move freely and S is frictionless then it would behave just as you have said. But if P is physically moved the conservation law must still apply even thought the balance is being disturbed. BA + Li= a constant means that if i is...
There is a conservation law for superconductors " the flux through a superconducting ring cannot change". This can be shown using Faraday's law: -
E.M.F=-d/dt (BA) where B is the measured magnetic field passing through the ring and A is the area enclosed by the ring
therefore for a ring...
An image thread is necessary to satisfy the boundary condition that a current can't flow perpendicular to the surface of the superconductor . An image thread outside the superconductor somehow satisfies this boundary condition. I don't fully understand the boundary condition or why the image...
If a field line is moved into a superconductor it meets resistance. This resistance is modeled by adding an image flux thread outside the superconductor which then attracts the flux thread being moved into the superconductor. Why is this attractive force an accurate model of the resistance a...