AC Circuit objective questions (mcq) and answers

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

   A. 0.636 E_max

   B. 0.707 E_max

   C. 0.434 E_max

   D. 1.414 E_max

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

   A. 0.5 I_max

   B. 0.707 I_max

   C. 0.9 I_max

   D. 1.414 I_max

23.  Form factor for a sine wave is

   A. 1.414

   B. 0.707

   C. 1.11

   D. 0.637

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

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

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