Q.1
A device that convert ac into dc is known as ....
  • rectifier
  • amplifier
  • oscillator
  • voltage regulator
Q.2
Barrier potential of germanium diode at room temperature is
  • 0.3 V
  • 0.5 V
  • 0.7 V
  • 0.9 V
Q.3
Ripple factor of a half wave rectifier is
  • 0.12
  • 0.48
  • 1.21
  • 1
Q.4
In a transistor emittor base junction has
  • high resistance
  • zero resistance
  • low resistance
  • infinite resistance
Q.5
The voltage gain of a transistor connected in common collector configuration is ------
  • Less than one
  • Less than 2
  • > 1
  • None of these
Q.6
The output resistance of a transistor connected in -----arrangement is the highest.
  • common emitter
  • Common base
  • Both A & B
  • None of these
Q.7
If the value of α is 0.9,then value of β is -----
  • 0.9
  • 900
  • 90
  • None of these
Q.8
The most commonly used semiconductor material in the manufacture of a transistor is ------
  • Carbon
  • Germanium
  • Silicon
  • Both A & B
Q.9
The voltage gain in a transistor connected in ------- arrangement is the highest
  • Common emitter
  • common collector
  • Common base
  • Both A & B
Q.10
Which ONE has the poorest bias stablisation without prevention of thermal runaway?
  • Fixed Bias
  • Emitter Feedback Bias
  • Collector Feedback Bias
  • Voltage Divider Bias
Q.11
In which region, the transistor operates.....?
  • Saturation Region
  • Cut-off Region
  • Active Region
  • None of the above
Q.12
The output impedance of a BJT transistor amplifier is __________ in nature.
  • resistive
  • capacitive
  • inductive
  • wireless
Q.13
The purpose of biasing is to establish a ______
  • amplification
  • power source
  • load line
  • Q-point
Q.14
Which statement about a transistor is correct?
  • Has two electrodes
  • Acts as a full wave rectifier
  • Has its own internal energy supply
  • Functions as an amplifier
Q.15
Which one of the following amplifier circuits provides a phase inversion between the input and output signal?
  • Common Base
  • Common source
  • Common collector
  • Common emitter
Q.16
The input and output signals of a common emitteramplifier are
  • in phase
  • 90 degree out of phase
  • 180 degree out of phase
  • 270 degree out of phase
Q.17
If the transistor operates such that it is either in the saturation or cut-off region, it is operating as
  • a filter
  • a switch
  • a signal amplifier
  • an emitter follower
Q.18
They are circuits or devices with the capability to increase output voltages or current compared to the input.
  • couplers
  • amplifiers
  • conductors
  • bypass components
Q.19
Which of the following is the first step in analyzing BJT in AC domain?
  • setting all DC sources to 0 and replaced them a short circuit equivalent
  • all capacitors are replaced by short circuit
  • connecting the BJT to a coupling and bypass capacitors
  • all elements bypassed will be replaced by a short circuit equivalent
0 h : 0 m : 1 s