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MCQs

Total Questions : 149 | Page 15 of 15 pages
Question 141. . ___ power represents the energy dissipated at a given point in time.
  1.    True
  2.    Reactive
  3.    Real
  4.    Instantaneous
 Discuss Question
Answer: Option D. -> Instantaneous
Question 142. . When current flow tries to decrease in an inductor, the magnetic field _______________ and the voltage polarity across the inductor _______________.
  1.    collapses, remains the same
  2.    expands, reverses
  3.    collapses, reverses
  4.    expands, remains the same
 Discuss Question
Answer: Option C. -> collapses, reverses
Question 143. . Inductive ___ represents the opposition to an alternating current.
  1.    impedance
  2.    resistance
  3.    reluctance
  4.    reactance
 Discuss Question
Answer: Option D. -> reactance
Question 144. . Electromagnetic induction is the generation of _________ from __________.
  1.    magnetism, electricity
  2.    electricity, electricity
  3.    electricity, magnetism
  4.    magnetism, magnetism
 Discuss Question
Answer: Option C. -> electricity, magnetism
Question 145. . The opposition to ac by an inductor is directly proportional to ___.
  1.    resistance
  2.    reactance
  3.    frequency
  4.    voltage
 Discuss Question
Answer: Option C. -> frequency
Question 146. . The ___ cannot change instantaneously in an inductor.
  1.    voltage
  2.    current
  3.    power
  4.    magnetic field
 Discuss Question
Answer: Option B. -> current
Question 147. . 
After the first time constant, a transient current has changed by _______________ %, leaving _______________ % remaining.
  1.    63.2, 36.8
  2.    36.8, 63.2
  3.    13.5, 86.5
  4.    86.5, 13.5
 Discuss Question
Answer: Option A. -> 63.2, 36.8
Question 148. . An RL integrator can act as a __________ filter and an RC differentiator can act as a __________ filter.
  1.    high-pass, high-pass
  2.    low-pass, low-pass
  3.    high-pass, low pass
  4.    low-pass, high-pass
 Discuss Question
Answer: Option D. -> low-pass, high-pass
Question 149. . An RL integrator can act as a __________ filter and an RC differentiator can act as a __________ filter.
  1.    high-pass, high-pass
  2.    low-pass, low-pass
  3.    high-pass, low pass
  4.    low-pass, high-pass
 Discuss Question
Answer: Option D. -> low-pass, high-pass

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