Semiconductor Diode

1. __________ rectifier has the lowest forward resistance

1. solid state
2. vacuum tube
3. gas tube
4. none of the above

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2. A 1,000 V power supply would use __________ as a filter capacitor

1. paper capacitor
2. air capacitor
3. mica capacitor
4. electrolytic capacitor

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3. A 10 V power supply would use __________ as filter capacitor.

1. paper capacitor
2. mica capacitor
3. electrolytic capacitor
4. air capacitor

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4. A crystal diode has __________

1. one pn junction
2. two pn junctions
3. three pn junctions
4. none of the above

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5. A crystal diode has forward resistance of the order of __________

1. kΩ
2. Ω
3. MΩ
4. none of the above

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6. A crystal diode is a __________ device

1. non-linear
2. bilateral
3. linear
4. none of the above

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7. A crystal diode is used as __________

1. an amplifier
2. a rectifier
3. an oscillator
4. a voltage regulator

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8. A crystal diode utilises __________ characteristic for rectification

1. reverse
2. forward
3. forward or reverse
4. none of the above

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9. A half-wave rectifier has an input voltage of 240 V r.m.s. If the step-down transformer has a turns ratio of 8:1, what is the peak load voltage? Ignore diode drop.

1. 27.5 V
2. 86.5 V
3. 30 V
4. 42.5 V

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10. A series resistance is connected in the zener circuit to __________

1. properly reverse bias the zener
2. protect the zener
3. properly forward bias the zener
4. none of the above

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