Electronic Devices and Circuits MCQs with answers Page - 17

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Q. What is the ideal maximum voltage gain of a common collector amplifier?

  • (A) unity
  • (B) infinite
  • (C) indeterminate
  • (D) zero

A

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Q. The output power of a transistor amplifier is more than the input power due to additional power supplied by

  • (A) transistor
  • (B) collector supply
  • (C) emitter supply
  • (D) base supply

A

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Q. When a transistor amplifier feeds a load of low resistance, its voltage gain will be

  • (A) low
  • (B) very high
  • (C) high
  • (D) moderate

A

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Q. The capacitors are considered in the ac equivalent circuit of a transistor amplifier.

  • (A) open
  • (B) partially open
  • (C) short
  • (D) partially short

A

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Q. For highest power gain, what configuration is used?

  • (A) cc
  • (B) cb
  • (C) ce
  • (D) cs

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Q. What is the most important characteristic of a common collector amplifier?

  • (A) high input voltage
  • (B) high input resistance
  • (C) high output resistance
  • (D) its being an amplifier circuit

A

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Q. Which of the item below does not describe a common emitter amplifier?

  • (A) high voltage gain
  • (B) high current gain
  • (C) very high power gain
  • (D) high input resistance

A

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Q. CC configuration is used for impedance matching because its

  • (A) input impedance is very high
  • (B) input impedance is very low
  • (C) output impedance is very low
  • (D) output impedance is zero

A

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Q. Which of the following is the other name of the output stage in an amplifier?

  • (A) load stage
  • (B) audio stage
  • (C) power stage
  • (D) rf stage

A

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Q. When amplifiers are cascaded

  • (A) the gain of each amplifier is increased
  • (B) a lower supply voltage is required
  • (C) the overall gain is increased
  • (D) each amplifier has to work less

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