Moving Iron Instrument Multiple Choice Questions and Answers


31. A moving iron instrument can be used for


   A.D.C. only

   B.A.C. only

   C.Both A.C and D.C.


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C.Both A.C and D.C.

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32. A moving iron type ammeter has far turns of thick wire so that


   A.Sensitivity is high

   B.Damping is effective

   C.Scale is large

   D.Resistance is less


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D.Resistance is less

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33. Moving iron instruments are rarely used in low power high resistance circuits because of


   A.High resistance of the coil

   B.Low reluctance of magnetic path

   C.High reluctance of magnetic path

   D.None of the above


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C.High reluctance of magnetic path

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34. Which of the following is the merit of a moving iron instrument


   A.It can be used under severe over-load conditions

   B.It has linear scale

   C.It can be used at high frequencies

   D.Its current sensitivity is high


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A.It can be used under severe over-load conditions

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35. ............ damping method is common in moving coil instruments


   A.Eddy current

   B.Fluid

   C.Spring

   D.Air


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A.Eddy current

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