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MCQs

Electromagnetic Induction, Alternating Current And Voltage

Total Questions : 385 | Page 6 of 39 pages
Question 51. Amplitude is the maximum value of a voltage or current.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 52. A ramp is the type of waveform characterized by a non-linear increase or decrease in voltage or current.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 53. The average half-cycle value of a sine wave with a 40 V peak is
  1.    25.48 V
  2.    6.37 V
  3.    14.14 V
  4.    50.96 V
 Discuss Question
Answer: Option A. -> 25.48 V
Question 54. A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of
  1.    25 kHz
  2.    12 kHz
  3.    18 kHz
  4.    1.3 MHz
 Discuss Question
Answer: Option B. -> 12 kHz
Question 55. When a sine wave has a frequency of 100 Hz in 12 s it goes through
  1.    1/100 cycle
  2.    12 cycles
  3.    120 cycles
  4.    1,200 cycles
 Discuss Question
Answer: Option D. -> 1,200 cycles
Question 56. If a sine wave goes through 10 cycles in 20 µs, the period is
  1.    20 µs
  2.    4 µs
  3.    2 µs
  4.    100 µs
 Discuss Question
Answer: Option C. -> 2 µs
Question 57. A waveform has a baseline of 3 V, a duty cycle of 20%, and an amplitude of 8 V. The average voltage value is
  1.    4 V
  2.    4.6 V
  3.    1.6 V
  4.    11 V
 Discuss Question
Answer: Option A. -> 4 V
Question 58. A phasor represents
  1.    The magnitude and a quantity direction
  2.    The width of a quantity
  3.    The phase angle
  4.    The magnitude of a quantity
 Discuss Question
Answer: Option A. -> The magnitude and a quantity direction
Question 59. Two series resistors are connected to an ac source. If there are 7.5 V rms across one resistor and 4.2 V rms across the other, the peak source voltage is
  1.    16.54 V
  2.    1.65 V
  3.    10.60 V
  4.    5.93 V
 Discuss Question
Answer: Option A. -> 16.54 V
Question 60. A 1 kHz signal has a period of 1 ms.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True

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