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Electrical Engineering Materials - section-1
  1. Carbon resistors are used extensively because they are

    2. A.

     Easy to make
    B.

     Compact
    C.

     Inexpensive
    D.

     All of the above reasons

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  2. The current due to electron flow in conduction band is the hole current in valence band.

    3. A.

     Equal to
    B.

     Less than
    C.

     Greater than
    D.

     Any of the above

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  3. The metal having the lowest temperature coefficient of resistance is

    4. A.

     Gold
    B.

     Copper
    C.

     Aluminium
    D.

     Kanthal

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  4. A perfect conductor has

    5. A.

     Zero conductivity
    B.

     Unity conductivity
    C.

     Infinite conductivity
    D.

     None of the above

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  5. For a particular material the Hall coefficient was found to be zero. The material is

    6. A.

     Insulator
    B.

     Metal
    C.

     Intrinsic semiconductor
    D.

     None of the above

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  6. Total number of crystal systems is

    7. A.

     2
    B.

     4
    C.

     7
    D.

     12

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  7. Superconductors are becoming popular for use in

    8. A.

     Generating very strong magnetic field
    B.

     Manufacture of bubble memories
    C.

     Generating electrostatic field
    D.

     Generating regions free from magnetic field

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  8. In graphite, bonding is

    9. A.

     Covalent
    B.

     Metallic
    C.

     Vander Waals
    D.

     Vander Waals and covalent

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  9. The converse of hardness is known as

    10. A.

     Malleability
    B.

     Toughness
    C.

     Softness
    D.

     None of the above

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  10. Which of the following resistive materials has the lowest temperature co-efficient of resistance ?

    11. A.

     Nichrome
    B.

     Constantan
    C.

     Kanthal
    D.

     Molybdenum

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