AC Fundamentals – Exercise – 1

16. In a certain series RC circuit, the true power is 2 W, and the reactive power is 3.5 VAR. What is the apparent power ?

(a) 3.5 VA
(b) 2 VA
(c) 4.03 VA
(d) 3 VA

Answer
Answer : (c)
Explanation
Explanation : No answer description available for this question.  Let us discuss.
Discuss
Discuss : Write your answer. Click here.

17. A power factor of ‘1’ indicates ________.

(a) purely resistive circuit
(b) purely reactive circuit
(c) combination of both, a and b
(d) none of these

Answer
Answer : (a)
Explanation
Explanation : No answer description available for this question.  Let us discuss.
Discuss
Discuss : Write your answer. Click here.

18. To which component in an RC circuit is the power dissipation due ?

(a) capacitance
(b) resistance
(c) both
(d) none

Answer
Answer : (b)
Explanation
Explanation : No answer description available for this question.  Let us discuss.
Discuss
Discuss : Write your answer. Click here.

19. A power factor of 0 indicates ________.

(a) purely resistive element
(b) purely reactive element
(c) combination of both a and b
(d) none of the above

Answer
Answer : (b)
Explanation
Explanation : No answer description available for this question.  Let us discuss.
Discuss
Discuss : Write your answer. Click here.

20. True power is defined as ________.

(a) VI cos θ
(b) VI
(c) VI sin θ
(d) none of these

Answer
Answer : (a)
Explanation
Explanation : No answer description available for this question.  Let us discuss.
Discuss
Discuss : Write your answer. Click here.

Related Posts

  • AC Fundamentals - 32AC Fundamentals » Exercise - 1 32. A sine wave voltage is applied across a capacitor, when the frequency of the voltage is increased, the current ________. (a) increases (b) decreases (c) remains the same (d) is zero
    Tags: voltage, sine, wave, current, basic, electrical, engineering
  • AC Fundamentals - 30AC Fundamentals » Exercise - 1 30. A sine wave voltage is applied across an inductor, when the frequency of voltage is increased, the current ________. (a) increases (b) decreases (c) remains the same (d) is zero
    Tags: voltage, sine, wave, current, basic, electrical, engineering
  • Capacitors and Capacitance - 325555555555 32. A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current ________. (a) increases (b) remains constant (c) decreases (d) ceases
    Tags: voltage, sine, wave, current, basic, electrical, engineering
  • Inductors and Inductance - 85555555555 8. A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current ________. (a) is increased (b) is decreased (c) does not change (d) momentarily goes to zero
    Tags: voltage, sine, wave, current, basic, electrical, engineering
  • AC Fundamentals - 22AC Fundamentals » Exercise - 122. If the peak value of a certain sine wave voltage is 5 V, what is the rms value ? (a) 0.707 V (b) 3.535 v (c) 5 V (d) 1.17 v
    Tags: sine, wave, voltage, basic, electrical, engineering