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MCQs

Total Questions : 330 | Page 26 of 33 pages
Question 251. A capacitor of 0.02 μF is larger than
  1.    All of these
  2.    200,000 pF
  3.    0.000020 F
  4.    2,000 pF
 Discuss Question
Answer: Option D. -> 2,000 pF
Question 252. A 10 μF, 20 μF, 22 μF, and 100 μF capacitor are in parallel. The total capacitance is
  1.    4.86 μF
  2.    152 μF
  3.    2.43 μF
  4.    100 μF
 Discuss Question
Answer: Option B. -> 152 μF
Question 253. What is the capacitance when Q = 60 μC and V = 12 V?
  1.    50 μF
  2.    12 μF
  3.    5 μF
  4.    720 μF
 Discuss Question
Answer: Option C. -> 5 μF
Question 254.  In a 20 Vac series RC circuit, if 20 V is measured across the resistor and 40 V is measured across the capacitor, the applied voltage is:
  1.    45 V
  2.    50 V
  3.    55 V
  4.    60 V
 Discuss Question
Answer: Option A. -> 45 V
Question 255.  Select the equation below that represents the relationship between charge, capacitance, and voltage for a capacitor.
  1.    Q = CV
  2.    C = QV
  3.    https://www.indiabix.com/_files/images/basic-electronics/complete/mca7_1002c1.gif
  4.    V = IR
 Discuss Question
Answer: Option A. -> Q = CV
Question 256.  When is a capacitor fully charged?
  1.    when the voltage across its plates is 1/2 of the voltage from ground to one of its plates
  2.    when the current through the capacitor is the same as when the capacitor is discharged
  3.    when the voltage across the plates is 0.707 of the input voltage
  4.    when the current through the capacitor is directly proportional to the area of the plates
 Discuss Question
Answer: Option B. -> when the current through the capacitor is the same as when the capacitor is discharged
Question 257.  What is the angle theta value for a 5.6 F capacitor and a 50-ohm resistor in series with a 1.1 kHz, 5 Vac source?
  1.    27.3 degrees
  2.    62.7 degrees
  3.    –27.3 degrees
  4.    –62.7 degrees
 Discuss Question
Answer: Option C. -> –27.3 degrees
Question 258.  You could increase the time constant of an RC circuit by
  1.    adding a resistor in parallel with the circuit resistance
  2.    adding a capacitor in parallel with the circuit capacitance
  3.    increasing the amplitude of the input voltage
  4.    exchanging the position of the resistor and capacitor in the circuit
 Discuss Question
Answer: Option B. -> adding a capacitor in parallel with the circuit capacitance
Question 259.  When a 4.7 F capacitor is connected to a 1 kHz source, what is its capacitive reactance?
  1.    4.7 ohms
  2.    29.5 ohms
  3.    34 ohms
  4.    213 ohms
 Discuss Question
Answer: Option C. -> 34 ohms
Question 260.  After which time constant can a capacitor be considered to be fully charged?
  1.    first
  2.    third
  3.    fifth
  4.    seventh
 Discuss Question
Answer: Option C. -> fifth

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