Q.1
In the initial stages of a multistage amplifier, we use ___________
  • RC coupling
  • Transformer coupling
  • Direct coupling
  • None of the above
Q.2
A radio receiver has ___________ of amplification
  • One stage
  • Two stages
  • Three stages
  • More than one stages
Q.3
RC coupling is used for ___________ amplification
  • Voltage
  • Current
  • Power
  • None of the above
Q.4
Transformer coupling is used for ___________ amplification
  • Power
  • Voltage
  • Current
  • None of the above
Q.5
The gain of an amplifier is expressed in db because ___________
  • It is a simple unit
  • Calculations become easy
  • Human ear response is logarithmic
  • None of the above
Q.6
The number of stages that can be directly coupled is limited because
  • Changes in temperature cause thermal instability
  • Circuit becomes heavy and costly
  • It becomes difficult to bias the circuit
  • None of the above
Q.7
If the power level of an amplifier reduces to half, the db gain will fall by .
  • 5 db
  • 2 db
  • 10 db
  • 3 db
Q.8
A current amplification ofis a gain of ___________
  • 3 db
  • 66 db
  • 20 db
  • 200 db
Q.9
RC coupling is not used to amplify extremely low frequencies because
  • There is considerable power loss
  • There is hum in the output
  • Electrical size of coupling capacitor becomes very large
  • None of the above
0 h : 0 m : 1 s