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MCQs

Total Questions : 330 | Page 31 of 33 pages
Question 301. . If a charged capacitor is disconnected from a circuit, it will:
  1.    immediately discharge
  2.    recharge
  3.    remain charged
  4.    leak the charge
 Discuss Question
Answer: Option D. -> leak the charge
Question 302. . How is ac current related to ac voltage in a purely capacitive circuit?
  1.    AC current is 0.707 of the ac voltage.
  2.    AC current lags ac voltage.
  3.    AC current is 0.637 of the ac voltage.
  4.    AC current leads ac voltage.
 Discuss Question
Answer: Option D. -> AC current leads ac voltage.
Question 303. . For a given charge difference, electrostatic field strength varies according to:
  1.    plate differential
  2.    plate area
  3.    plate distance
  4.    dielectric quantity
 Discuss Question
Answer: Option B. -> plate area
Question 304. . A capacitor has 25 V across its plates and a stored charge of 1500 mu.gifC. What is the capacitance value?
  1.    60 pF
  2.    60 mu.gifF
  3.    16.67 mF
  4.    37.5 mF
 Discuss Question
Answer: Option B. -> 60 mu.gifF
Question 305. . A capacitor and an output resistor form a series circuit with a square wave applied. The circuit is:
  1.    an integrator
  2.    a differentiator
  3.    a multiplier
  4.    a divider
 Discuss Question
Answer: Option B. -> a differentiator
Question 306. . Capacitive reactance values connected in series offer
  1.    an increase in total XC
  2.    a decrease in total XC
  3.    no change in total XC
  4.    total opposition to voltage in the circuit
 Discuss Question
Answer: Option A. -> an increase in total XC
Question 307. . What is the impedance of an ac RC parallel circuit if the resistance is 12 ohms and the capacitive reactance equals 5 ohms?
  1.    0.2 ohms
  2.    3.5 ohms
  3.    4.6 ohms
  4.    13 ohms
 Discuss Question
Answer: Option C. -> 4.6 ohms
Question 308. . If a capacitor is placed across a 20 V source, what will be the amount of charge after 5 tc?
  1.    5.0 V
  2.    12.8 V
  3.    13.5 V
  4.    20 V
 Discuss Question
Answer: Option D. -> 20 V
Question 309. . The quantity that represents an ideal capacitor dissipating 0 W of power is
  1.    instantaneous power
  2.    true power
  3.    reactive power
  4.    resistive power
 Discuss Question
Answer: Option B. -> true power
Question 310. . What will a 1 F capacitor store?
  1.    one coulomb of charge
  2.    6.24 x 1012 electrons
  3.    one volt
  4.    one A of current
 Discuss Question
Answer: Option B. -> 6.24 x 1012 electrons

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