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MCQs

Total Questions : 163 | Page 12 of 17 pages
Question 111. . An oscillator whose frequency can be controlled by an input "control voltage" is called a(n) ______ .
  1.    PLL
  2.    Schmitt trigger
  3.    VCO
  4.    S-R latch
 Discuss Question
Answer: Option C. -> VCO
Question 112. . If doubling the voltage across a resistor doubles the current through the resistor then
  1.    the resistor value decreased
  2.    the resistor value did not change
  3.    the resistor value increased
  4.    it is impossible to determine the change in the resistor value
 Discuss Question
Answer: Option B. -> the resistor value did not change
Question 113. . What is the kilowatt-hour consumption of a 40 W lamp if it remains on for 1750 h?
  1.    43.75
  2.    70
  3.    43,750
  4.    70,000
 Discuss Question
Answer: Option B. -> 70
Question 114. . A damaged resistor
  1.    may appear burned
  2.    may have an increased resistance value
  3.    may be checked with an ohmmeter
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 115. . Power supplies differ from batteries in that
  1.    power supply output voltages are ac and not dc
  2.    power supply voltages are not stable
  3.    power supplies are low-current devices
  4.    None of the above
 Discuss Question
Answer: Option D. -> None of the above
Question 116. . If the resistance in a circuit with constant voltage increases, the current will
  1.    increase
  2.    decrease
  3.    stay the same
  4.    Not enough information
 Discuss Question
Answer: Option B. -> decrease
Question 117. . Ohm's law describes the mathematical relationship between
  1.    ohms, kilohms, and megohms
  2.    resistor size and resistor value
  3.    resistance, voltage, and current
  4.    none of the above
 Discuss Question
Answer: Option C. -> resistance, voltage, and current
Question 118. . If voltage across a resistance doubles
  1.    the current is halved
  2.    the resistance doubles
  3.    the current is unchanged
  4.    none of the above
 Discuss Question
Answer: Option D. -> none of the above
Question 119. . The rate at which work is performed is called
  1.    current
  2.    energy
  3.    power
  4.    voltage
 Discuss Question
Answer: Option C. -> power
Question 120. . A battery's capacity to deliver power is measured in
  1.    kWh
  2.    Ah
  3.    Wh
  4.    Vh
 Discuss Question
Answer: Option B. -> Ah

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