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Home Electronics and Communication Engineering Analog Electronics Comments

  • Question
  • 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)

  • Correct Answer
  • surge resistor 

    Explanation
    Resistor reduces surge current.

    Analog Electronics problems


    Search Results


    • 1. In the op-amp circuit of figure, V0 =

    • Options
    • A. Vi
    • B. 3 Vi
    • C. 5 Vi
    • D. 0.5 Vi
    • Discuss
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. In a circuit of figure, Vs = 10 cos(?t) power drawn by the 2? resistor is 4 watts. The power factor is

    • Options
    • A. 0.3
    • B. 0.4
    • C. 0.6
    • D. none
    • Discuss
    • 6. In figure v1 = 8 V and v2 = 4 V. Which diode will conduct?

    • Options
    • A. D2 only
    • B. D1 only
    • C. Both D1 and D2
    • D. Neither D1 nor D2
    • Discuss
    • 7. In figure ID = 4 mA. Then VS =

    • Options
    • A. 20 V
    • B. 4.4 V
    • C. 0.4 V
    • D. 0.44 V
    • Discuss
    • 8. 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
    • 9. 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
    • 10. 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


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