☰ Analog Electronics (Electrical Engineering) - MCQs

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Q19.

In case of amplifiers, which coupling gives the highest gain?

  • A. transformer coupling
  • B. resistance coupling
  • C. impedance coupling
  • D. capacitance coupling
    ✍ Discuss    
Q20.

The bandwidth of an amplifier may be increased by

  • A. reduce the stray capacitances to the minimum possible
  • B. cascading it
  • C. reducing the capacitance of bypass capacitors
  • D. increase input signal frequency
    ✍ Discuss    
Q21.

The amplifier gain varies with frequency. This happens mainly due to

  • A. miller effect
  • B. logarithmic increase in its output power
  • C. interstage transformers
  • D. presence of external and internal capacitances
    ✍ Discuss    
Q22.

In an amplifier, the coupling capacitors are employed for

  • A. limiting the bandwidth
  • B. matching the impedances
  • C. controlling the output
  • D. preventing of DC mixing with input or output
    ✍ Discuss    
Q23.

Power gain in decibels bulge is equal to voltage gain in decibels only when

  • A. input impedance is zero
  • B. output impedance is zero
  • C. never
  • D. input impedance is equal to output impedance
    ✍ Discuss    
Q24.

By increasing the number of identical stages in an amplifier, the gain bandwidth product

  • A. decreases
  • B. becomes unity
  • C. remains constant
  • D. increases
    ✍ Discuss    
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