Q.1
The phase difference between the input and output voltages of a transistor connected in common collector arrangement is ___________
  • 0°
  • 90°
  • 180°
  • 270°
Q.2
The voltage gain of a transistor connected in common collector arrangement is ___________
  • equal to 1
  • more than 10
  • more than 100
  • less than 1
Q.3
The phase difference between the input and output voltages in a common base arrangement is ___________
  • 180°
  • 90°
  • 270°
  • 0°
Q.4
Frequencies above ___________ kHz are called radio frequencies
  • 2
  • 10
  • 50
  • 200
Q.5
If the temperature increases, the value of VCE ___________
  • Remains the same
  • Is increased
  • Is decreased
  • None of the above
Q.6
The value of VBE ___________
  • Depends upon IC to moderate extent
  • Is almost independent of IC
  • Is strongly dependant on IC
  • None of the above
Q.7
In the above question, what are the values of cut-off frequencies?
  • 140 kHz , 60 kHz
  • 1020 kHz , 980 kHz
  • 1030 kHz , 970 kHz
  • None of the above
Q.8
In a parallel LC circuit, if the signal frequency is decreased below the resonant frequency, then ___________
  • XL decreases and XC increases
  • XL increases and XC decreases
  • Line current becomes minimum
  • None of the above
Q.9
In parallel resonance, the circuit impedance is ___________
  • C/LR
  • R/LC
  • CR/L
  • L/CR
Q.10
Transistor biasing is generally provided by a ___________
  • Biasing circuit
  • Bias battery
  • Diode
  • None of the above
Q.11
In a transistor ___________
  • IC = IE + IB
  • IB = IC + IE
  • IE = IC - IB
  • IE = IC + IB
Q.12
In the double tuned circuit, if the mutual inductance between the two tuned circuits is decreased, the level of resonance curve ___________
  • Remains the same
  • Is lowered
  • Is raised
  • None of the above
Q.13
The arrow in the symbol of a transistor indicates the direction of ___________
  • electron current in the emitter
  • electron current in the collector
  • hole current in the emitter
  • donor ion current
Q.14
IC = ß IB + ___________
  • ICBO
  • IC
  • ICEO
  • aIE
Q.15
For faithful amplification by a transistor circuit, the value of VBE should ___________ for a silicon transistor
  • Be zero
  • Be 0.01 V
  • Not fall below 0.7 V
  • Be between 0 V and 0.1 V
Q.16
The relation between ß and a is ___________
  • ß = 1 / (1 – a )
  • ß = (1 – a ) / a
  • ß = a / (1 – a )
  • ß = a / (1 + a )
Q.17
A resonant circuit contains ___________ elements
  • R and L only
  • R and C only
  • Only R
  • L and C
Q.18
If a high degree of selectivity is desired, then double-tuned circuit should have ___________ coupling
  • Loose
  • Tight
  • Critical
  • None of the above
Q.19
Transistor biasing represents ___________ conditions
  • a.c.
  • d.c.
  • both a.c. and d.c.
  • none of the above
Q.20
At series resonance, the circuit offers ___________ impedance
  • Zero
  • Maximum
  • Minimum
  • None of the above
Q.21
A tuned amplifier is generally operated in ___________ operation
  • Class A
  • Class C
  • Class B
  • None of the above
Q.22
The most commonly used transistor arrangement is ___________ arrangement
  • common emitter
  • common base
  • common collector
  • none of the above
Q.23
Transistor biasing is done to keep ___________ in the circuit
  • Proper direct current
  • Proper alternating current
  • The base current small
  • Collector current small
0 h : 0 m : 1 s