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MCQs

Analog Electronics

Total Questions : 482 | Page 44 of 49 pages
Question 431. When the Q point moves along the load line, VCE decreases when the collector current
  1.      increases.
  2.     decreases.
  3.     stays the same.
  4.    None of these
 Discuss Question
Answer: Option A. ->   increases.
Question 432. If the base resistor has zero resistance, the transistor will probably be
  1.      destroyed.
  2.    None of these
  3.     saturated.
  4.     in cutoff.
 Discuss Question
Answer: Option A. ->   destroyed.
Question 433. The collector current is 1.5 mA. If the current gain is 50, the base current is
  1.      30 µA.
  2.     3 mA.
  3.     3 µA.
  4.     150 µA.
 Discuss Question
Answer: Option A. ->   30 µA.
Question 434. If the collector resistor opens in a base-biased circuit, the load line will become
  1.     useless.
  2.     flat.
  3.     vertical.
  4.      horizontal.
 Discuss Question
Answer: Option D. ->   horizontal.
Question 435. When there is no base current in a transistor switch, the output voltage from the transistor is
  1.     unknown.
  2.      high.
  3.     low.
  4.     unchanged.
 Discuss Question
Answer: Option B. ->   high.
Question 436. If the collector resistor is open, the collector voltage is
  1.     unknown.
  2.     high.
  3.     unchanged.
  4.      low.
 Discuss Question
Answer: Option D. ->   low.
Question 437. If the current gain is unknown in an emitter-biased circuit, you cannot calculate the
  1.     collector current.
  2.     emitter current.
  3.      base current.
  4.     emitter voltage.
 Discuss Question
Answer: Option C. ->   base current.
Question 438. If the emitter resistor is open, the collector voltage is
  1.     low.
  2.     unknown.
  3.      high.
  4.     unchanged.
 Discuss Question
Answer: Option C. ->   high.
Question 439. The first step in analyzing emitter-based circuits is to find the
  1.      emitter current.
  2.     base current.
  3.     supply current.
  4.     collector current.
 Discuss Question
Answer: Option A. ->   emitter current.
Question 440. If the emitter resistance decreases, the
  1.     Q point stays where it is.
  2.     current gain increases.
  3.     collector current decreases.
  4.      Q point moves up.
 Discuss Question
Answer: Option D. ->   Q point moves up.

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