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Semiconductor Diode

Free 44+ Semiconductor Diode MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Practise below with answers and explanations.

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Semiconductor Diode — MCQs for Pakistan government job tests

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SEMICONDUCTOR DIODE

Practice questions

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1.Which characteristic of a zener diode is primarily used in its functioning?

2.Given an AC input with an RMS voltage of 400/√2 volts applied to a half-wave rectifier, what is the required Peak Inverse Voltage (PIV) rating of the diode?

3.For which type of rectifier is a transformer required?

4.What is a major drawback of using a half-wave rectifier?

5.What type of breakdown voltage characterizes a Zener diode?

6.Why is a resistor placed in series with a zener diode in its circuit?

7.Within its breakdown region, a Zener diode functions as which type of source?

8.What type of device is a zener diode classified as?

9.Why is mains alternating current (AC) converted into direct current (DC)?

10.What is the ripple factor value for a half-wave rectifier?

11.What is the highest efficiency achievable by a half-wave rectifier?

12.Given an identical secondary voltage, how does the output voltage of a center-tap rectifier compare to that of a bridge rectifier?

13.A half-wave rectifier receives an input of 240 V RMS. If the step-down transformer has a turns ratio of 8 to 1, what is the peak voltage across the load? Assume the diode voltage drop is negligible.

14.Which type of filter circuit provides the most effective voltage regulation?

15.Which type of capacitor is suitable as a filter capacitor for a 1,000 V power supply?

16.What happens when the Peak Inverse Voltage (PIV) rating of a diode is surpassed?

17.Which type of rectifier is the most commonly utilized in electrical circuits?

18.How does the Peak Inverse Voltage (PIV) rating of each diode in a bridge rectifier compare to that in an equivalent center-tapped rectifier?

19.Which type of capacitor is typically used as a filter capacitor in a 10 V power supply?

20.Which type of rectifier exhibits the least forward resistance?

How to prepare with Semiconductor Diode MCQs

  • Work through questions topic by topic, then revisit any you answered incorrectly.
  • Read explanations carefully—they often cover facts that repeat across PPSC, FPSC, and NTS papers.
  • Pair subject practice with past papers to see how Semiconductor Diode appears in real exam conditions.

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