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MCQs

Total Questions : 330 | Page 2 of 33 pages
Question 11. A 12 kHz voltage is applied to a 0.33 µF capacitor, and 200 mA of rms current is measured. What is the value of the voltage?
  1.    8 V
  2.    80 V
  3.    800 V
  4.    0.88 V
 Discuss Question
Answer: Option A. -> 8 V
Question 12. When the plate area of a capacitor increases,
  1.    The capacitance increases
  2.    The capacitance decreases
  3.    The capacitance is unaffected
  4.    The voltage it can withstand increases
 Discuss Question
Answer: Option A. -> The capacitance increases
Question 13. A 2 µF, a 4 µF, and a 10 µF capacitor are connected in series. The total capacitance is less than
  1.    2 µF
  2.    4 µF
  3.    10 µF
  4.    1.5 µF
 Discuss Question
Answer: Option D. -> 1.5 µF
Question 14. Which of the following capacitors is polarized?
  1.    Mica
  2.    Ceramic
  3.    Plastic-film
  4.    Electrolytic
 Discuss Question
Answer: Option D. -> Electrolytic
Question 15. A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current
  1.    Increases
  2.    Remains constant
  3.    Decreases
  4.    Ceases
 Discuss Question
Answer: Option C. -> Decreases
Question 16. When the voltage across a capacitor is tripled, the stored charge
  1.    Triples
  2.    Is cut to one-third
  3.    Stays the same
  4.    Doubles
 Discuss Question
Answer: Option A. -> Triples
Question 17. Of the following capacitors, which one has the highest dielectric constant?
  1.    Air
  2.    Mica
  3.    Glass
  4.    Paper
 Discuss Question
Answer: Option C. -> Glass
Question 18. A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased
  1.    VR > VC
  2.    VC > VR
  3.    VR = VC
  4.    VR and VC = 0
 Discuss Question
Answer: Option A. -> VR > VC
Question 19. The dielectric constant is the ability of a material to establish an electric field.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 20. A 0.01 µF capacitor equals how many picofarads?
  1.    100 pF
  2.    1,000 pF
  3.    10,000 pF
  4.    100,000 pF
 Discuss Question
Answer: Option C. -> 10,000 pF

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