Lakshya Education MCQs

Question: In any A.C. circuit always
Options:
A.Apparent power is more than actual power
B.Reactive power is more than apparent power
C.Actual power is more than reactive power
D.Reactive power is more than actual power
Answer: Option A

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More Questions on This Topic :

Question 1. The transient currents are associated with the
  1.    Changes in the stored energy in the inductors and capacitors
  2.    Impedance of the circuit
  3.    Applied voltage to the circuit
  4.    Resistance of the circuit
Answer: Option A
Question 2. Power factor of an electrical circuit is equal to
  1.    R/Z
  2.    Cosine of phase angle difference between current and voltage
  3.    Ratio of useful current to total current Iw/I
  4.    All above
Answer: Option D
Question 3. The inductance of a coil can be increased by
  1.    Increasing core length
  2.    Decreasing the number of turns
  3.    Decreasing the diameter of the former
  4.    Choosing core material having high relative permeability
Answer: Option D
Question 4. Which of the following refers to a parallel circuit?
  1.    The current through each element is same
  2.    The voltage across element is in proportion to it's resistance value
  3.    The equivalent resistance is greater than any one of the resistors
  4.    The current through any one element is less than the source current
Answer: Option D
Question 5. At very low frequencies a series R-C circuit behaves as almost purely
  1.    Resistive
  2.    Inductive
  3.    Capacitive
  4.    None of the above
Answer: Option C
Question 6. In an A.C. circuit power is dissipated in
  1.    Resistance only
  2.    Inductance only
  3.    Capacitance only
  4.    None of the above
Answer: Option A

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