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Regulated DC Power Supply - section-1
  1. Which of these is the best description for a Zener diode?

    2. A.

     It is a diode
    B.

     It is a constant current device
    C.

     It is a constant-voltage device
    D.

     It works in the forward region

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  2. In a 15 V Zener diode , the breakdown mechanism will occur by ___________

    3. A.

     Avalanche mechanism
    B.

     Zener mechanism
    C.

     Both Zener and avalanche mechanism
    D.

     None of the above

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  3. A Zener diode utilises ___________ characteristic for voltage regulation

    4. A.

     Forward
    B.

     Reverse
    C.

     Both forward and reverse
    D.

     None of the above

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  4. In a loaded Zener regulator, which is the largest Zener current?

    5. A.

     Series current
    B.

     Zener current
    C.

     Load current
    D.

     None of the above

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  5. A power supply can deliver a maximum rated current of 0.5 A at full-load output voltage of 20 V. What is the minimum load resistance that you can connect across the supply?

    6. A.

     10 Ω
    B.

     20 Ω
    C.

     15 Ω
    D.

     40 Ω

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  6. A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation?

    7. A.

     3.09
    B.

     2.87
    C.

     5.72
    D.

     None of the above

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  7. In an unregulated power supply, if input a.c. voltage increases, the output voltage .

    8. A.

     Increases
    B.

     Decreases
    C.

     Remains the same
    D.

     None of the above

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