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Discussion :: Measurements and Instrumentation

  1. Consider the following instruments

    1. Tangent galvanometer
    2. Rayleigh current balance
    3. Household energy meter
    4. Hot wire ammeter
    Out of above absolute instruments are

    2. A.
    1, 2 and 3
    B.
    1, 2 and 4
    C.
    1 and 2
    D.
    2, 3 and 4

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    Answer : Option C

    Explanation :

    Only tangent galvanometer and Rayleigh Current balance are absolute instruments. Energy meter and ammeter are secondary instruments.

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