Duduli

Type i superconductor is one in which the transition from superconductivity state to normal state in presence of magnetic field occurs sharply at the critical value Hc. ★ They are perfectly diamagnetic. ★ They follow meissner effect strictly. ★ The critical value Hc for type i   superconductors is found to be very   low, i.e for small value of Hc it behaves   normal conductor therefore it is known   as soft superconductor.

When the electrical resistance of a substance drops suddenly to zero, when it is cooled below a certain temperature, the phenomenon is known as superconductivity.