(Solved): subject name- materials nano science( btech)kindly answer within 90min to get 100% thubs up (5) Expl ...

(5) Explain the term critical magnetic field in a superconductor. How does the critical magnetic field vary with temperature in type-I and Type-II superconductors. What is Meissner effect. Which experiment confirms the energy band gap in between superconducting state and normal state. Is the energy band gap is same for semiconductor and superconductors? Derive London's equation and show that magnetic field decreases exponential inside the superconducting material. show that current density can sustain without external power supply in the superconducting state. (4)