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  • Question

  • Assertion (A): CE amplifier is the most widely used BJT amplifier

    Reason (R): CE amplifier has zero phase difference between input and output


  • Options
  • A. Both A and R are correct and R is correct explanation for A
  • B. Both A and R are correct but R is not correct explanation for A
  • C. A is correct R is wrong
  • D. A is wrong R is correct

  • Correct Answer
  • A is correct R is wrong 

    Explanation
    There is 180° phase difference between input and output.

    Analog Electronics problems

    Search Results

    • 1. For a base current of 10 ?A, what is the value of collector current in common emitter if ?dc = 100

    • Options
    • A. 10 ?A
    • B. 100 ?A
    • C. 1 mA
    • D. 10 mA
      • Discuss
    • 2. An RC coupled amplifier has an open loop gain of 200 and a lower cutoff frequency of 50 Hz. If negative feedback with ? = 0.1 is used, the lower cut off frequency will be

    • Options
    • A. about 50 Hz
    • B. about 5 Hz
    • C. about 2.38 Hz
    • D. about 70.5 Hz
      • Discuss
    • 3. The input impedance of op-amp circuit of figure is

    • Options
    • A. 120 k ohm
    • B. 110 k ohm
    • C. infinity
    • D. 10 k ohm
      • Discuss
    • 4. For a system to work, as oscillator the total phase shift of the loop gain must be equal to

    • Options
    • A. 90°
    • B. 45°
    • C. 270°
    • D. 360°
      • Discuss
    • 5. If the input to the ideal comparator shown in the figure is a sinusoidal signal of 8 V (peak to peak) without any DC component, then the output of the comparator has a duty cycle of

    • Options
    • A. 1/2
    • B. 1/3
    • C. 1/6
    • D. 1/12
      • Discuss
    • 6. Maximum efficiency of class B power amplifier is 50%.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. In the amplifier circuit of figure hfe = 100 and hie = 1000 ?. The voltage gain of amplifier is about

    • Options
    • A. 0.33
    • B. 0.5
    • C. 0.66
    • D. 1
      • Discuss
    • 8. Si transistor of following figure has a = 0.9 and ICE= 0, VEE = 5 V and VCC = 13 V, then RE will be if IEQ = 1 mA

    • Options
    • A. 3 k?
    • B. 4 k?
    • C. 5 k?
    • D. 4.3 k?
      • Discuss
    • 9. In figure what is the base current if VBE = 0.7 V

    • Options
    • A. 10 mA
    • B. 9.3 mA
    • C. 10 ?A
    • D. 9.3 ?A
      • Discuss
    • 10. The load impedance ZL of a CE amplifier has R and L in series. The phase difference between output and input will be

    • Options
    • A. 180°
    • B. 0
    • C. more than 90° but less than 180°
    • D. more than 180° but less than 270°
      • Discuss

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