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- Question
A pn junction allows current flow when
Options- A. the p-type material is more positive than the n-type material
- B. the n-type material is more positive than the p-type material
- C. both the n-type and p-type materials have the same potential
- D. there is no potential on the n-type or p-type materials
- Correct Answer
- the p-type material is more positive than the n-type material
- 1. In a diode schematic, the anode is represented by a(n):
Options- A. triangle
- B. vertical line
- C. zig-zag line
- D. element indicator Discuss
- 2. A filtered full-wave rectifier voltage has a smaller ripple than does a half-wave rectifier voltage for the same load resistance and capacitor values because:
Options- A. there is a shorter time between peaks
- B. there is a longer time between peaks
- C. the larger the ripple, the better the filtering action
- D. none of the above Discuss
- 3. The peak inverse voltage (PIV) across a nonconducting diode in a bridge rectifier equals approximately:
Options- A. half the peak secondary voltage
- B. twice the peak secondary voltage
- C. the peak value of the secondary voltage
- D. four times the peak value of the secondary voltage Discuss
- 4. If the frequency of the applied ac signal to a half-wave rectifier is 60 Hz, the frequency of the pulsating dc output will be
Options- A. 30 pps
- B. 60 pps
- C. 90 pps
- D. 120 pps Discuss
- 5. Shunting the ac component away from the load is the task of a:
Options- A. transformer
- B. filter
- C. regulator
- D. rectifier Discuss
- 6. When a diode is forward biased, the voltage across it
Options- A. is directly proportional to the current
- B. is inversely proportional to the current
- C. is directly proportional to the source voltage
- D. remains approximately the same Discuss
- 7. DC power should be connected to forward bias a diode as follows:
Options- A. ? anode, + cathode
- B. ? cathode, ? anode
- C. + anode, ? cathode
- D. + cathode, + anode Discuss
- 8. What is the peak output voltage for this half-wave rectifier?
Options- A. 1 V
- B. 7.8 V
- C. 10.9 V
- D. 15.6 V Discuss
- 9. Since diodes are destroyed by excessive current, circuits must have:
Options- A. higher voltage sources
- B. current limiting resistors
- C. more dopants
- D. higher current sources Discuss
- 10. In a power supply diagram, which block indicates a smooth dc output?
Options- A. transformer
- B. filter
- C. rectifier
- D. regulator Discuss
Diodes and Applications problems
Search Results
Correct Answer: triangle
Correct Answer: there is a shorter time between peaks
Correct Answer: the peak value of the secondary voltage
Correct Answer: 60 pps
Correct Answer: filter
Correct Answer: remains approximately the same
Correct Answer: + anode, ? cathode
Correct Answer: 7.8 V
Correct Answer: current limiting resistors
Correct Answer: regulator
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