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Electrical Engineering Mcqs

The frequency response of transformer coupling is___________?

  • (A)  Good
  • (B)  Very good
  • (C)  Excellent
  • (D)  Poor
Submitted By :Ali Uppal


1 db corresponds to_____________change in power level?

  • (A)  50%
  • (B)  35%
  • (C)  26%
  • (D)  22%
Submitted By :Ali Uppal


The lower and upper cut off frequencies are also called_____________frequencies?

  • (A)  Sideband
  • (B)  Resonant
  • (C)  Half-resonant
  • (D)  Half-power
Submitted By :Ali Uppal


Transformer coupling provides high efficiency because___________?

  • (A)  Collector voltage is stepped up
  • (B)  resistance is low
  • (C)  collector voltage is stepped down
  • (D)  none of the above
Submitted By :Ali Uppal


Transformer coupling is used for__________amplification?

  • (A)  Power
  • (B)  Voltage
  • (C)  Current
  • (D)  None of the above
Submitted By :Ali Uppal


In an RC coupling scheme, the coupling capacitor CC must be large enough______________?

  • (A)  To pass d.c. between the stages
  • (B)  Not to attenuate the low frequencies
  • (C)  To dissipate high power
  • (D)  None of the above
Submitted By :Ali Uppal


When a multistage amplifier is to amplify d.c. signal, then one must use_____________coupling?

  • (A)  RC
  • (B)  Transformer
  • (C)  Direct
  • (D)  None of the above
Submitted By :Ali Uppal


In practice, voltage gain is expressed______________?

  • (A)  In db
  • (B)  In volts
  • (C)  As a number
  • (D)  None of the above
Submitted By :Ali Uppal


The final stage of a multistage amplifier uses______________?

  • (A)  RC coupling
  • (B)  Transformer coupling
  • (C)  Direct coupling
  • (D)  Impedance coupling
Submitted By :Ali Uppal


RC coupling is not used to amplify extremely low frequencies because____________?

  • (A)  There is considerable power loss
  • (B)  There is hum in the output
  • (C)  Electrical size of coupling capacitor becomes very large
  • (D)  None of the above
Submitted By :Ali Uppal