Engineering Physics

Multiple Choice Questions

1. Below transition temperature, the electrical resistance of a superconductor is.    ( )
   1. finite
   2. large
   3. zero
   4. none
2. For an impure metal, the transition width is.    ( )
   1. zero
   2. finite
   3. large
   4. none
3. The time required to decay persistent current to 1/e of its initial value is3    ( )
   1. more than 1,00,000 years
   2. 1000 years
   3. 100 years
   4. 10 years
4. The following element will not show superconductivity.    ( )
   1. gold
   2. silver
   3. coper
   4. all
5. Superconducting bearings operate:    ( )
   1. with contact
   2. without contact
   3. with lubricant
   4. without lubricant
6. The energy gap in a superconductor is maximum at.    ( )
   1. critical temperature
   2. above critical temperature
   3. below critical temperature
   4. at 0 K
7. Below transition temperature, the London penetration depth.    ( ...