Electronic Devices and Circuits MCQs with answers Page - 8

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A

Admin • 833.24K Points
Coach

Q. All MOSFETs are subject to damage from electrostatic discharge (ESD).

  • (A) true
  • (B) false
  • (C) ---
  • (D) ---

A

Admin • 833.24K Points
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Q. If VD is less than expected (normal) for a self-biased JFET circuit, then it could be caused by a(n)

  • (A) open rg.
  • (B) open gate lead.
  • (C) fet internally open at gate.
  • (D) all of the above

A

Admin • 833.24K Points
Coach

Q. A coupling capacitor is

  • (A) a dc short
  • (B) an ac open
  • (C) a dc open and an ac short
  • (D) a dc short and an ac open

A

Admin • 833.24K Points
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Q. In a bypass circuit, the top of a capacitor is

  • (A) an open
  • (B) a short
  • (C) an ac ground
  • (D) a mechanical ground

A

Admin • 833.24K Points
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Q. The capacitor that produces an ac ground is called a

  • (A) bypass capacitor
  • (B) coupling capacitor
  • (C) dc open
  • (D) ac open

A

Admin • 833.24K Points
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Q. The output voltage of a CE amplifier is

  • (A) amplified
  • (B) inverted
  • (C) 180° out of phase with the input
  • (D) all of the above

A

Admin • 833.24K Points
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Q. A common-gate amplifier is similar in configuration to which BJT amplifier?

  • (A) common-emitter
  • (B) common- collector
  • (C) common-base
  • (D) emitter- follower

A

Admin • 833.24K Points
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Q. In a class A transformer-coupled amplifier, the the value of VCEmax and the the value of VCEmin, the the efficiency to (from) the theoretical limit of 50%.

  • (A) larger, smaller, farther
  • (B) larger, smaller, closer
  • (C) smaller, larger, closer
  • (D) none of the above

A

Admin • 833.24K Points
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Q. In class B operation, the current drawn from a single power supply has the form of rectified signal.

  • (A) a full-wave
  • (B) a half-wave
  • (C) both a full-wave and a half-wave
  • (D) none of the above

A

Admin • 833.24K Points
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Q. The highest efficiency is obtained in class B operation when the level of VL(p) is equal to .

  • (A) 0.25vcc
  • (B) 0.50vcc
  • (C) vcc
  • (D) 2vcc

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