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MCQs

Total Questions : 163 | Page 13 of 17 pages
Question 121. . Energy is defined as the ability to
  1.    produce heat
  2.    Produce light
  3.    produce sound
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 122. . Power supplies are regulated to prevent the output voltage from changing due to changes in the
  1.    line voltage
  2.    supply load
  3.    frequency
  4.    both line voltage and supply load
 Discuss Question
Answer: Option D. -> both line voltage and supply load
Question 123. . Ohm's law is a relationship between
  1.    voltage, current, and time
  2.    power, current, and resistance
  3.    resistance, time, and current
  4.    voltage, current, and resistance
 Discuss Question
Answer: Option D. -> voltage, current, and resistance
Question 124. . What electromotive force would cause 20 A of current to flow through a 500 omega.gif resistor?
  1.    0.04 V
  2.    2.5 V
  3.    25.0 V
  4.    10,000 V
 Discuss Question
Answer: Option D. -> 10,000 V
Question 125. . The voltage across a ___ resistor is 12 V and the current through it is 500 mu.gifA.
  1.    600 omega.gif
  2.    2.4 komega.gif
  3.    6 komega.gif
  4.    24 komega.gif
 Discuss Question
Answer: Option D. -> 24 komega.gif
Question 126. . With a differential gain of 50,000 and a common-mode gain of 2, what is the common-mode rejection ratio?
  1.    –87.9 dB
  2.    –43.9 dB
  3.    43.9 dB
  4.    87.9 dB
 Discuss Question
Answer: Option D. -> 87.9 dB
Question 127. . In an open-loop op-amp circuit, whenever the inverting input (–) is negative relative to the noninverting input (+), the output will:
  1.    swing negative
  2.    close the loop
  3.    be balanced
  4.    swing positive
 Discuss Question
Answer: Option D. -> swing positive
Question 128. . If current through a resistance is halved
  1.    the resistance is halved
  2.    the voltage is halved
  3.    the voltage doubles
  4.    none of the above
 Discuss Question
Answer: Option B. -> the voltage is halved
Question 129. . If the voltage across a resistor ___, the current flowing through it will increase.
  1.    increases
  2.    decreases
  3.    stays the same
  4.    Not enough information
 Discuss Question
Answer: Option A. -> increases
Question 130. . The power is ___ if 200 J of energy are used in 10 s.
  1.    2 W
  2.    5 W
  3.    20 W
  4.    50 W
 Discuss Question
Answer: Option C. -> 20 W

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