Q.1
The hybrid-π model of a BJT is useful for analysis at all frequency ranges and variation of other transistor parameters.
  • a) true
  • b) false
Q.2
If the Sand Sparameters of a common emitter operated BJT is high:
  • a) then the output and input ports are matched well
  • b) there is mismatch in the ports
  • c) the gain of the amplifier is high
  • d) none of the mentioned
Q.3
If a common emitter configuration BJT is treated as a two port network, the gain of the amplifier is roughly given by the S parameter:
  • a) S11
  • b) S12
  • c) S21
  • d) S22
Q.4
Short circuit current gain of BJT is given by the expression:
  • a) gm/ωC
  • b) ωC/ gm
  • c) gm/C
  • d) none of the mentioned
Q.5
The output collector to emitter current of a BJT amplifier is independent of the input base current of the amplifier.
  • a) true
  • b) false
Q.6
The current gain of a BJT ________ with frequency.
  • a) increases
  • b) decreases
  • c) remains constant
  • d) none of the mentioned
Q.7
If a transistor has a short circuit current gain ofand the capacitance measured in the hybrid-π model of the transistor waspF. Then the threshold frequency of operation of the transistor is:
  • a) 60 MHz
  • b) 45.6 GHz
  • c) 66.3 GHz
  • d) 34.8 GHz
Q.8
Hetero junction bipolar transistors have the same working principle and operation as that of a BJT.
  • a) true
  • b) false
Q.9
Advantage of HJT over BJT is that it has:
  • a) higher gain
  • b) high frequency of operation
  • c) sophisticated construction
  • d) none of the mentioned
Q.10
The Sparameter of a HJT increases with increase in the operating frequency of the transistor.
  • a) true
  • b) false
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