- A. Only holes
- B. Only free electrons
- C. Holes and free electrons
- D. None of the above
Semiconductor Diode
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In a semiconductor, current conduction is due to_____.
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If the doping level in a crystal diode is increased, the width of depletion layer_____.
- A. remains the same
- B. is decreased
- C. in increased
- D. none of the above
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If the a.c. input to a half-wave rectifier is an r.m.s value of 400/√2 volts, then diode PIV rating is_____.
- A. 400/√2 V
- B. 400 V
- C. 400 x √2 V
- D. none of the above
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A zener diode is ______ device.
- A. a non-linear
- B. a linear
- C. an amplifying
- D. none of the above
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A zener diode has _______ breakdown voltage.
- A. undefined
- B. sharp
- C. zero
- D. none of the above
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If the doping level of a crystal diode is increased, the breakdown voltage_____.
- A. remains the same
- B. is increased
- C. is decreased
- D. none of the above
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For the same secondary voltage, the output voltage from a centre-tap rectifier is ______ than that of bridge rectifier.
- A. twice
- B. thrice
- C. four time
- D. one-half
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The d.c. resistance of a crystal diode is _______ its a.c. resistance.
- A. the same as
- B. more than
- C. less than
- D. none of the above
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The _______ filter circuit results in the best voltage regulation.
- A. choke input
- B. capacitor input
- C. resistance input
- D. none of the above
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When a crystal diode is used as a rectifier, the most important consideration is ______.
- A. forward characteristic
- B. doping level
- C. reverse characteristic
- D. PIC rating