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MCQs

Electromagnetic Induction, Alternating Current And Voltage

Total Questions : 385 | Page 37 of 39 pages
Question 361. If the rms current through a 4.7 k resistor is 4 mA, the peak voltage drop across the resistor is
  1.    18.8 V
  2.    2.66 V
  3.    4 V
  4.    26.6 V
 Discuss Question
Answer: Option D. -> 26.6 V
Question 362. A pulse waveform has a high time of 8 ms and a pulse width of 32 ms. The duty cycle is
  1.    1%
  2.    50%
  3.    25%
  4.    100%
 Discuss Question
Answer: Option C. -> 25%
Question 363. If the peak of a sine wave is 13 V, the peak-to-peak value is
  1.    None of these
  2.    26 V
  3.    6.5 V
  4.    13 V
 Discuss Question
Answer: Option B. -> 26 V
Question 364. A sinusoidal current has an rms value of 14 mA. The peak-to-peak value is
  1.    16 mA
  2.    45.12 mA
  3.    39.6 mA
  4.    22.6 mA
 Discuss Question
Answer: Option C. -> 39.6 mA
Question 365. A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle
  1.    is 100%
  2.    cannot be determined
  3.    is 30%
  4.    is 1%
 Discuss Question
Answer: Option C. -> is 30%
Question 366. A signal with a 400 s period has a frequency of
  1.    25,000 Hz
  2.    2,500 Hz
  3.    400 Hz
  4.    250 Hz
 Discuss Question
Answer: Option B. -> 2,500 Hz
Question 367. The average value of a 12 V peak sine wave over one complete cycle is
  1.    0 V
  2.    6.37 V
  3.    7.64 V
  4.    1.27 V
 Discuss Question
Answer: Option A. -> 0 V
Question 368. When a sine wave has a frequency of 100 Hz in 12 s it goes through
  1.    120 cycles
  2.    12 cycles
  3.    1,200 cycles
  4.    1/100 cycle
 Discuss Question
Answer: Option C. -> 1,200 cycles
Question 369. A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of
  1.    1.3 MHz
  2.    18 kHz
  3.    12 kHz
  4.    25 kHz
 Discuss Question
Answer: Option C. -> 12 kHz
Question 370. A sawtooth wave has a period of 10 ms. Its frequency is
  1.    100 Hz
  2.    10 Hz
  3.    1,000 Hz
  4.    50 Hz
 Discuss Question
Answer: Option A. -> 100 Hz

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