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  • Question
  • The efficiency of a full wave rectifier using centre tapped transformer is twice that in full wave bridge rectifier.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    Explanation
    Efficiency of full wave rectifier with centre tapped transformer is slightly higher than that of bridge rectifier.

    Analog Electronics problems


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    • 1. 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
    • 2. In figure ID = 4 mA. Then VS =

    • Options
    • A. 20 V
    • B. 4.4 V
    • C. 0.4 V
    • D. 0.44 V
    • Discuss
    • 3. 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
    • 4. 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
    • 5. In the op-amp circuit of figure, V0 =

    • Options
    • A. Vi
    • B. 3 Vi
    • C. 5 Vi
    • D. 0.5 Vi
    • Discuss
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. 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


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