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Engineering Physics by S. Mani Naidu

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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.    ( ...

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