A superconducting ring carries a steady current in the presence of a magnetic field \(\vec B\) normal to the plane of the ring. Identify the INCORRECT statement.
1
The flux passing through the superconductor is quantized in units of hc/e
2
The current and the magnetic field in the superconductor are time independent.
3
The current density \(\vec J\) and \(\vec B\) are related by the equation \(\vec{\nabla} \times \vec{j}+\Lambda^2 \vec{B}=0\) , where Λ is a constant
4
The superconductor shows an energy gap which is proportional to the transition temperature of the superconductor