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Discussion :: Measurements and Instrumentation

  1. The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240 x 10-6 N-m on full scale. If B = 1 Wb/m2, range of meter is

    2. A.
    1 mA
    B.
    2 mA
    C.
    3 mA
    D.
    4 mA

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    Answer : Option B

    Explanation :

    NBAI = Controlling torque or

    = 240 x 10-6 or I = 2 mA.

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