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MCQs

Analog Electronics

Total Questions : 482 | Page 45 of 49 pages
Question 441. When the current gain increases from 50 to 300 in an emitter-biased circuit, the collector current
  1.      remains almost the same.
  2.     increases by a factor of 6.
  3.     decreases by a factor of 6.
  4.     is zero.
 Discuss Question
Answer: Option A. ->   remains almost the same.
Question 442. When testing an npn transistor using an ohmmeter, the collector-emitter resistance will be low when
  1.     the emitter is positive in respect to the collector.
  2.      the transistor is defective.
  3.     the transistor is normal.
  4.     the collector is positive in respect to the emitter.
 Discuss Question
Answer: Option B. ->   the transistor is defective.
Question 443. If the emitter resistance increases, the collector voltage
  1.      increases.
  2.     stays the same.
  3.     decreases.
  4.     breaks down the transistor.
 Discuss Question
Answer: Option A. ->   increases.
Question 444. The major advantage of a photo transistor as compared to a photo diode is its
  1.     durability.
  2.     AC operation.
  3.     response to higher frequencies.
  4.      increased sensitivity.
 Discuss Question
Answer: Option D. ->   increased sensitivity.
Question 445. Given (135)x + (144)x = (323)x what is the value of base x?
  1.     3
  2.     6
  3.     4
  4.     5
 Discuss Question
Answer: Option B. ->  6
Question 446. For emitter bias, the voltage at the emitter is 0.7 V less than the
  1.     emitter voltage.
  2.     ground voltage.
  3.     collector voltage.
  4.      base voltage.
 Discuss Question
Answer: Option D. ->   base voltage.
Question 447. If (211)X = (152)8, then the value of base x is
  1.     7
  2.     6
  3.     5
  4.     9
 Discuss Question
Answer: Option A. ->  7
Question 448. Voltage Series (feedback also called series-shunt feedback) results in
  1.    Increase in both input & output impedances
  2.    Decreases in both input & output impedances
  3.    Increase in input impedance & decreases in output impedance
  4.    Decrease in input impedance & increase in output impedance
 Discuss Question
Answer: Option C. -> Increase in input impedance & decreases in output impedance
Question 449. A voltage with square waveform having values of +5V and 0V is
  1.    wifi signal
  2.    digital signal
  3.    current signal
  4.    analog signal
 Discuss Question
Answer: Option B. -> digital signal
Question 450. The efficiency of a full wave rectifier using centre tapped transformer is twice that in full wave bridge rectifier
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False

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