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MCQs

Total Questions : 480 | Page 18 of 48 pages
Question 171. The north pole of a magnet is the one:
  1.    that has its molecules arranged in a random pattern
  2.    that would be attracted to the earth's north magnetic pole
  3.    that would be repelled by the south pole of another magnet
  4.    that would be attracted to the earth's south magnetic pole
  5.    None of the above
 Discuss Question
Answer: Option B. -> that would be attracted to the earth's north magnetic pole
Question 172. A resistor has a rated value of 100 ohm and a tolerance of 10%. What is its minimum and maximum allowable resistance value?
  1.    90 Ohm - 101 ohm
  2.    90 Ohm - 110 ohm
  3.    98 Ohm - 100.1 ohm
  4.    99 Ohm - 102 ohm
  5.    None of the above
 Discuss Question
Answer: Option B. -> 90 Ohm - 110 ohm
Question 173. When a parallel RLC circuit is operating at its resonant frequency:
  1.    capacitive reactance is greater than the inductive reactance
  2.    inductive reactance is greater than the capacitive reactance
  3.    inductive reactance is equal to the capacitive reactance
  4.    the difference between inductive and capacitive reactance is equal to the resistance
  5.    None of the above
 Discuss Question
Answer: Option C. -> inductive reactance is equal to the capacitive reactance
Question 174. For normal operation of the transistor, the collector diode has to be
  1.    Forward-biased
  2.    Reverse-biased
  3.    Nonconducting
  4.    Operating in the breakdown region
  5.    None of the above
 Discuss Question
Answer: Option B. -> Reverse-biased
Question 175. In a step-down transformer, which is larger?
  1.    Primary voltage
  2.    Secondary voltage
  3.    Neither
  4.    Impossible to say
  5.    None of the above
 Discuss Question
Answer: Option A. -> Primary voltage
Question 176. What is the barrier potential of a silicon diode at room temperature?
  1.    0.7V
  2.    0.3V
  3.    1 V
  4.    2 m V per degree Celsius
  5.    None of the above
 Discuss Question
Answer: Option A. -> 0.7V
Question 177. The Norton current is sometimes called the
  1.    Shorted-load current
  2.    Open-load current
  3.    Thevenin current
  4.    Thevenin voltage
  5.    None of the above
 Discuss Question
Answer: Option A. -> Shorted-load current
Question 178. A current source has an internal resistance of 100 kW. What is the largest load resistance if the current source must appear stiff?
  1.    2 k Ohm
  2.    10 k Ohm
  3.    20 k Ohm
  4.    1 k Ohm
  5.    None of the above
 Discuss Question
Answer: Option D. -> 1 k Ohm
Question 179. At room temperature a conductor has low many holes?
  1.    Same number as free electrons
  2.    many
  3.    Only those produced by thermal energy
  4.    less than the free electrons
  5.    None of the above
 Discuss Question
Answer: Option A. -> Same number as free electrons
Question 180. When the Q point moves along the load line, the voltage increases when the current
  1.    Decreases
  2.    Stays the same
  3.    Increases
  4.    Can be any of above
  5.    None of the above
 Discuss Question
Answer: Option C. -> Increases

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