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MCQs

Electromagnetic Induction, Alternating Current And Voltage

Total Questions : 385 | Page 39 of 39 pages
Question 381. The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is
  1.    400 Hz
  2.    40 Hz
  3.    indeterminable
  4.    100 Hz
 Discuss Question
Answer: Option A. -> 400 Hz
Question 382. How many degrees are there in /3 rad?
  1.    60°
  2.    27°
  3.    180°
  4.    6°
 Discuss Question
Answer: Option A. -> 60°
Question 383. If the rms voltage drop across a 15 k resistor is 16 V, the peak current through the resistor is
  1.    1.5 mA
  2.    15 mA
  3.    10 mA
  4.    1 mA
 Discuss Question
Answer: Option A. -> 1.5 mA
Question 384. To produce an 800 Hz sine wave, a four-pole generator must be operated at
  1.    800 rps
  2.    400 rps
  3.    1,600 rps
  4.    200 rps
 Discuss Question
Answer: Option B. -> 400 rps
Question 385. One sine wave has a positive-going zero crossing at 15° and another sine wave has a positive-going zero crossing at 55°. The phase angle between the two waveforms is
  1.    0°
  2.    None of these
  3.    45°
  4.    40°
 Discuss Question
Answer: Option D. -> 40°

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