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  • Question
  • 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

  • Correct Answer
  • 1 mA 

    Explanation
    IC = 10 x 100 ?A = 1 mA.

    Analog Electronics problems


    Search Results


    • 1. 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
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. The transistor of following figure in Si diode with a base current of 40 ?A and ICBO = 0, if VBB = 6V, RE = 2 k? and ? = 90, IBQ = 20 ?A then RB =

    • Options
    • A. 200 k?
    • B. 265 k?
    • C. 150 k?
    • D. 100 k?
    • Discuss
    • 6. 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
    • Discuss
    • 7. Maximum efficiency of class B power amplifier is 50%.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. 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
    • 9. 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
    • 10. 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


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