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MCQs

Total Questions : 227 | Page 12 of 23 pages
Question 111. Doubling the operating frequency of a purely capacitive circuit:
  1.    doubles the amount of total current
  2.    None of these
  3.    cuts the total current by one-half
  4.    thrice the amount of total current
  5.    has no effect on the total circuit current
 Discuss Question
Answer: Option A. -> doubles the amount of total current
Question 112. Current can flow through a normally open push button switch as long as:
  1.    its contact remain open
  2.    None of these
  3.    its contact remain open
  4.    you are not pressing the button
  5.    you are pressing the button
 Discuss Question
Answer: Option D. -> you are not pressing the button
Question 113. An unloaded zener regulator has a source voltage of 20 V, a series resistance of 330 W, and a zener voltage of 12 V, What is the Zener current?
  1.    68.4 mA
  2.    24.2 mA
  3.    28.4 mA
  4.    None of these
  5.    34.4 mA
 Discuss Question
Answer: Option B. -> 24.2 mA
Question 114. The total capacitance of a series capacitor circuit is:
  1.    equal to the sum of the individual capacitance values
  2.    equal to the sun of the individual capacitive-reactance values
  3.    equal to the source voltage divided by total current
  4.    less than the value of the smallest capacitor
  5.    None of these
 Discuss Question
Answer: Option D. -> less than the value of the smallest capacitor
Question 115. How much current flows through a 0.02 micro F capacitor that is operating from a 12-V ac, 100-Hz source?
  1.    2.02 A
  2.    0.995 mA
  3.    157 raA
  4.    0.151 mA
  5.    None of these
 Discuss Question
Answer: Option D. -> 0.151 mA
Question 116. Doubling the operating frequency of an inductive circuit:
  1.    multiplies the inductive reactance by 6.28
  2.    None of these
  3.    has no effect on the inductive reactance
  4.    cuts the inductive reactance in half
  5.    doubles the amount of inductive reactance
 Discuss Question
Answer: Option E. -> doubles the amount of inductive reactance
Question 117. When operating above its resonant frequency, a parallel RLC circuit has the characteristics of a:
  1.    purely resistive circuit
  2.    parallel RL circuit
  3.    None of these
  4.    parallel RC circuit
  5.    parallel RLC circuit operated above its resonant frequency
 Discuss Question
Answer: Option D. -> parallel RC circuit
Question 118. To get the Thevenin voltage, you have to
  1.    Short the load resistor
  2.    Open the load resister
  3.    Short the voltage source
  4.    None of these
  5.    Open the voltage source
 Discuss Question
Answer: Option A. -> Short the load resistor
Question 119. Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?
  1.    1000 W
  2.    100 W
  3.    20 W
  4.    None of these
  5.    200 W
 Discuss Question
Answer: Option E. -> 200 W
Question 120. Which one of the following properties of a magnetic circuit can be directly compared to resistance in an electrical circuit?
  1.    Reluctance
  2.    Permeance
  3.    There is no valid comparison
  4.    Retentivity
  5.    Permeability
 Discuss Question
Answer: Option A. -> Reluctance

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