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MCQs

Total Questions : 480 | Page 13 of 48 pages
Question 121. Absolute Zero temperature equals
  1.    0o C
  2.    -273o C
  3.    -276o C
  4.    25o C
  5.    None of the above
 Discuss Question
Answer: Option B. -> -273o C
Question 122. At cut off, the Q point is at
  1.    upper end of the load line
  2.    middle of the load line
  3.    lower end of the load line
  4.    infinity
  5.    None of the above
 Discuss Question
Answer: Option C. -> lower end of the load line
Question 123. The south pole of a magnet is the one:
  1.    that would be attracted to the earths north magnetic pole
  2.    that has its molecules arranged in a random pattern
  3.    that would be attracted to the earth's south magnetic pole
  4.    that would be repelled by the north pole of another magnet
  5.    None of the above
 Discuss Question
Answer: Option B. -> that has its molecules arranged in a random pattern
Question 124. Which one of the following statements is true?
  1.    Capacitive reactance is at a minimum for dc source voltages
  2.    Capacitive reactance decreases as the operating frequency increases
  3.    There is no meaningful relationship between capacitive reactance and operating frequency
  4.    Capacitive reactance increases as the operating frequency increases
  5.    None of the above
 Discuss Question
Answer: Option B. -> Capacitive reactance decreases as the operating frequency increases
Question 125. The peak value of a sine waveform is:
  1.    the amplitude at 70.7% of the maximum value
  2.    the amplitude at 90% of the maximum value
  3.    the amplitude at 1.41 times the maximum value
  4.    the maximum positive or negative value
  5.    None of the above
 Discuss Question
Answer: Option D. -> the maximum positive or negative value
Question 126. Which one of the following statements is true for voltage in a parallel circuit?
  1.    The total voltage in a parallel circuit is equal to the average value of the individual voltages
  2.    The total voltage in a parallel circuit is always less than the value of the smallest voltage
  3.    The total voltage is equal to the sum of the voltages across the individual branches in a parallel circuit
  4.    The total voltage of a parallel circuit is the same as the voltages across each branch
  5.    None of the above
 Discuss Question
Answer: Option D. -> The total voltage of a parallel circuit is the same as the voltages across each branch
Question 127. The dielectric constant of a material is a measure of:
  1.    the amount of voltage it can withstand before breaking down
  2.    how well the material concentrates electrostatic lines of force
  3.    the amount of opposition to the current flow
  4.    how well the material concentrates magnetic lines of force
  5.    None of the above
 Discuss Question
Answer: Option B. -> how well the material concentrates electrostatic lines of force
Question 128. When operating above its resonant frequency, a series RLC circuit has the characteristics of a:
  1.    series RL circuit
  2.    series RC circuit
  3.    series RLC circuit operated below its resonant frequency
  4.    purely resistive circuit
  5.    None of the above
 Discuss Question
Answer: Option A. -> series RL circuit
Question 129. What is the inductive reactance of a 2-H coil operating at 60 Hz?
  1.    754 Ohm
  2.    30 Ohm
  3.    60 Ohm
  4.    120 Ohm
  5.    None of the above
 Discuss Question
Answer: Option A. -> 754 Ohm
Question 130. What is the primary difference between primary and secondary cell batteries?
  1.    Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged
  2.    Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
  3.    Primary-cell batteries use chemical cells, whereas secondary-cell batteries use an alternative energy source, such as thermal or magnetic energy, to supplement their outputs
  4.    Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries
  5.    None of the above
 Discuss Question
Answer: Option B. -> Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged

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