Q.1
Which of the following parameters of BJT is very sensitive to temperature?
  • RE
  • beta DC
  • VCC
  • RTh
Q.2
Total emitter current is:
  • IE – IC
  • IC + IE
  • IB + IC
  • IB – IC
Q.3
Which junction is forward biased when transistor is used as an amplifier?
  • Emitter-Base
  • Emitter-Collector
  • Collector-Base
  • No junction is forward biased
Q.4
To operate properly, a transistor's base-emitter junction must be forward biased with reverse bias applied to which junction?
  • collector-emitter
  • base-collector
  • base-emitter
  • collector-base
Q.5
When transistors are used in digital circuits they usually operate in the:
  • active region
  • breakdown region
  • saturation and cutoff regions
  • linear region
Q.6
In a transistor, collector current is controlled by:
  • collector voltage
  • base current
  • collector resistance
  • all of the above
Q.7
Most of the electrons in the base of an NPN transistor flow:
  • out of the base lead
  • into the collector
  • into the emitter
  • into the base supply
Q.8
Which is beta's current ratio?
  • IC/IB
  • IC/IE
  • IB/IE
  • IE/IB
Q.9
Which is the higher gain provided by a C-E configuration?
  • voltage
  • current
  • resistance
  • power
Q.10
The power gain is highest in Common emitter.
  • True
  • false
Q.11
An electronic circuit having the capability to amplify power, voltage or current
  • transformer
  • attenuator
  • amplifier
  • transistor
Q.12
What are the names of the legs on a Bipolar Junction Transistors?
  • Collector, Anode, and Emitter
  • Collector, Base, and Gate
  • Collector, Base, and Emitter
  • None of these
Q.13
α\alphaα is
  • voltage amplification factor
  • current amplification factor
  • electron amplification factor
  • hole amplification factor
Q.14
Zener diodes uually operated in
  • forward bias
  • reverse bias
  • above knee voltage
  • none of these
Q.15
Number of diodes used in centre tap rectifier is
  • 1
  • 2
  • 3
  • 4
Q.16
The collector- base junction of a transistor is ------ biased
  • Reverse biased
  • Emitter biased
  • Both A & B
  • None of these
Q.17
Rectifier that can be used for high voltage applications is
  • half wave rectifier
  • centre tap full wave rectifier
  • bridge rectifier
  • all the above
Q.18
Collector of a transistor will be
  • less doped
  • moderately doped
  • heavily doped
  • without doped
Q.19
A full wave bridge rectifier has an efficiency of ------
  • 100
  • 91.2
  • 81.2
  • 40.6
Q.20
A zener diode is used as a ......
  • rectifier
  • amplifier
  • oscillator
  • voltae regulator
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