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MCQs

Total Questions : 118 | Page 11 of 12 pages
Question 101. . If a metallic conductor has a positive temperature coefficient of resistance, then:
  1.    as temperature increases, resistance decreases
  2.    as current increases, resistance decreases
  3.    as voltage increases, current increases
  4.    as temperature increases, resistance increases
 Discuss Question
Answer: Option C. -> as voltage increases, current increases
Question 102. . If a calculator display was "0.00263," what would this answer be in percent?
  1.    0.026%
  2.    0.26%
  3.    2.63%
  4.    26.3%
 Discuss Question
Answer: Option B. -> 0.26%
Question 103. . The word work means that:
  1.    energy has been transferred
  2.    it is inversely related to energy
  3.    no energy has been transferred
  4.    work and energy are not related
 Discuss Question
Answer: Option A. -> energy has been transferred
Question 104. . One advantage of a carbon film resistor over a carbon composition resistor is:
  1.    less circuit noise
  2.    smaller size
  3.    higher wattage
  4.    poor tolerance
 Discuss Question
Answer: Option A. -> less circuit noise
Question 105. . A 33 komega.gif resistor with a 20% tolerance checks out as ok with which of the following ohmmeter readings?
  1.    26400 ohms
  2.    24183 ohms
  3.    6600 ohms
  4.    39970 ohms
 Discuss Question
Answer: Option A. -> 26400 ohms
Question 106. . After a lamp is turned on, its filament resistance will change to become:
  1.    less resistive
  2.    cooler
  3.    brighter
  4.    more resistive
 Discuss Question
Answer: Option D. -> more resistive
Question 107. . How is power dissipated in a resistor?
  1.    by resistance
  2.    by voltage
  3.    by current
  4.    by heat
 Discuss Question
Answer: Option D. -> by heat
Question 108. . For P = V2/R, a decrease in resistance should produce:
  1.    a decrease in power
  2.    an increase in ohms
  3.    an increase in power
  4.    a decrease in current
 Discuss Question
Answer: Option C. -> an increase in power
Question 109. . Wirewound resistors are usually used in circuits that have:
  1.    high current
  2.    negative temperature coefficients
  3.    low power
  4.    high voltage
 Discuss Question
Answer: Option A. -> high current
Question 110. . Resistance in a circuit is:
  1.    opposition to current
  2.    opposition to voltage
  3.    the same as current
  4.    the same as voltage
 Discuss Question
Answer: Option A. -> opposition to current

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