Question

Calculate the critical current and current density for a wire of lead ( Pb ) having a diameter of 3mm .

The critical magnetic field is 8.9×1000 Amp 1/m ?​

Answer 1

Answer:

Critical Magnetic Field and Critical Current

For a superconductor with critical temperature Tc = K.

and a critical magnetic field at zero Kelvin of Bc(0) = T,

then at a temperature of T = K.

the critical magnetic field is Bc = T.

For a wire of radius cm = micrometers (microns)

the maximum current is Ic = Amperes