AC Circuit objective questions (mcq) and answers


21.  For a sine wave with peak value Emax the average value


   A. 0.636 Emax

   B. 0.707 Emax

   C. 0.434 Emax

   D. 1.414 Emax


✔ View Answer


A. 0.636 Emax

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22.  For a sine wave with peak value Imax the r.m.s. value


   A. 0.5 Imax

   B. 0.707 Imax

   C. 0.9 Imax

   D. 1.414 Imax


✔ View Answer


B.0.707 Imax

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23.  Form factor for a sine wave is


   A. 1.414

   B. 0.707

   C. 1.11

   D. 0.637


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C. 1.11

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24.  The form factor is the ratio of


   A. Peak value to r.m.s. value

   B. r.m.s. value to average value

   C. Average value to r.m.s. value

   D. None of the above


✔ View Answer


B. r.m.s. value to average value

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25.  The period of a wave is


   A. The same as frequency

   B. Time required to complete one cycle

   C. Expressed in amperes

   D. None of the above


✔ View Answer


B. Time required to complete one cycle

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