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MCQs

Total Questions : 480 | Page 47 of 48 pages
Question 461. 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 462. 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 463. 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 464. 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 465. 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 466. What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it?
  1.    3 W
  2.    6 W
  3.    64 W
  4.    122 W
  5.    None of the above
 Discuss Question
Answer: Option B. -> 6 W
Question 467. Inductive reactance is measured in units of:
  1.    volts per second
  2.    amperes per second
  3.    Ohm
  4.    henrys
  5.    None of the above
 Discuss Question
Answer: Option C. -> Ohm
Question 468. An ideal voltage source has
  1.    Zero internal resistance
  2.    Infinite internal resistance
  3.    A load dependent voltage
  4.    A load-dependent current
  5.    None of the above
 Discuss Question
Answer: Option A. -> Zero internal resistance
Question 469. What is the difference between the kinds of charges for an electron and a proton?
  1.    An electron has a positive charge and a proton has no charge
  2.    An electron has a positive charge and a proton has a negative charge
  3.    An electron has a negative charge and a proton has a positive charge
  4.    An electron has a negative charge and a proton has no charge
  5.    None of the above
 Discuss Question
Answer: Option C. -> An electron has a negative charge and a proton has a positive charge
Question 470. Which one of the following kinds of materials has the highest permeability?
  1.    A diamagnetic material
  2.    A ferromagnetic material
  3.    A paramagnetic material
  4.    All of the above
  5.    None of the above
 Discuss Question
Answer: Option B. -> A ferromagnetic material

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