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  • Question

  • In figure v1 = 8 V and v2 = 4 V. Which diode will conduct?
    In figure v1 = 8 V and v2 = 4 V. Which diode will conduct? D2 only D1 only Both D1 and D2 Neither D1


  • Options
  • A. D2 only
  • B. D1 only
  • C. Both D1 and D2
  • D. Neither D1 nor D2

  • Correct Answer
  • D1 only 

    Explanation
    D1 will conduct and the output voltage will be about 7 V. Therefore D2 will be reverse biased and will not conduct.

    Analog Electronics problems

    Search Results

    • 1. To protect the diodes in a rectifier and capacitor input filter circuit it is necessary to use

    • Options
    • A. surge resistor
    • B. surge inductor
    • C. surge capacitor
    • D. both (a) and (b)
      • Discuss
    • 2. In the op-amp circuit of figure, V0 =

    • Options
    • A. Vi
    • B. 3 Vi
    • C. 5 Vi
    • D. 0.5 Vi
      • Discuss
    • 3. If an amplifier with gain of - 1000 and feedback factor ? = - 0.1 had a gain change of 20% due to temperature, the change in gain of the feedback amplifier would be

    • Options
    • A. 10%
    • B. 5%
    • C. 0.2%
    • D. 0.01%
      • Discuss
    • 4. An amplifier has a large ac input signal. The clipping occurs on both the peaks. The output voltage will be nearly a

    • Options
    • A. sine wave
    • B. square wave
    • C. triangular wave
    • D. (a) or (c)
      • Discuss
    • 5. In a BJT circuit a pnp transistor is replaced by npn transistor. To analyse the new circuit

    • Options
    • A. all calculations done earlier have to be repeated
    • B. replace all calculated voltages by reverse values
    • C. replace all calculated currents by reverse values
    • D. replace all calculated voltages and currents by reverse values
      • Discuss
    • 6. In figure ID = 4 mA. Then VS =

    • Options
    • A. 20 V
    • B. 4.4 V
    • C. 0.4 V
    • D. 0.44 V
      • Discuss
    • 7. A half wave diode rectifier has a capacitance input filter. If input voltage is Vm sin ?t, PIV is

    • Options
    • A. Vm
    • B. 2 Vm
    • C. 3 Vm
    • D. 4 Vm
      • Discuss
    • 8. The efficiency of a full wave rectifier using centre tapped transformer is twice that in full wave bridge rectifier.

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

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