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MCQs

Total Questions : 199 | Page 4 of 20 pages
Question 31. The instantaneous value is the voltage or current value of a waveform at its peak.
  1.     True
  2.     False
  3.     1.5 ms
  4.     3,000 µs
 Discuss Question
Answer: Option B. ->  False
Question 32. A sine wave with an rms value of 12 v is riding on a dc level of 18 v. the maximum value of the resulting waveform is
  1.     6 V
  2.     30 V
  3.     35 V
  4.     0 V
 Discuss Question
Answer: Option C. ->  35 V
Question 33. Average value of a sine wave is 0.707 times the peak value.
  1.     True
  2.     False
  3.     35 V
  4.     0 V
 Discuss Question
Answer: Option B. ->  False
Question 34. A sinusoidal current has an rms value of 14 ma. the peak-to-peak value is
  1.     45.12 mA
  2.     16 mA
  3.     39.6 mA
  4.     22.6 mA
 Discuss Question
Answer: Option C. ->  39.6 mA
Question 35. The designation rms means repetitions measured per second.
  1.     True
  2.     False
  3.     500 kHz
  4.     33.33 kHz
 Discuss Question
Answer: Option B. ->  False
Question 36. If the rms voltage drop across a 15 kΩ resistor is 16 v, the peak current through the resistor is
  1.     15 mA
  2.     1.5 mA
  3.     10 mA
  4.     1 mA
 Discuss Question
Answer: Option B. ->  1.5 mA
Question 37. If the rms current through a 6.8 kΩ resistor is 8 ma, the rms voltage drop across the resistor is
  1.     5.44 V
  2.     54.4 V
  3.     7.07 V
  4.     8 V
 Discuss Question
Answer: Option B. ->  54.4 V
Question 38. Which, among the following, is the correct expression for alternating emf generated?
  1.    e=2Blvsin(θ)
  2.    e=2B²lvsin(θ)
  3.    e=Blvsin(θ)
  4.    e=4Blvsin(θ)
 Discuss Question
Answer: Option C. -> e=Blvsin(θ)
Answer: (c).e=Blvsin(θ)
Question 39. Calculate the maximum emf when the velocity is 10m/s, the length is 3m and the magnetic field density is 5T.
  1.    150V
  2.    100V
  3.    300V
  4.    0V
 Discuss Question
Answer: Option A. -> 150V
Answer: (a).150V
Question 40. When a coil is rotated in a magnetic field, the emf induced in it?
  1.    Is maximum
  2.    Is minimum
  3.    Continuously varies
  4.    Remains constant
 Discuss Question
Answer: Option C. -> Continuously varies
Answer: (c).Continuously varies

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