Electrical Engineering MCQs MCQs
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Which of the item below does not mean a VARACTOR diode?
- A. VOLTACAPS
- B. VARICAPS
- C. Voltage variable capacitors
- D. Variable resistance diode
- Correct Answer: Option D
What electronic circuit converts AC to DC where the DC output peak value can be greater than the AC input peak value?
- A. Voltage multiplier
- B. Rectifier
- C. Clamper
- D. Clipper
- Correct Answer: Option A
A microwave diode in which the carriers that transverse the drift region are generated by minority carrier injection from a forward-biased junction instead of being extracted from the plasma of an avalanche region.
- A. IMPATT
- B. TRAPAT
- C. BARITT diode
- D. Esaki diode
- Correct Answer: Option C
A cold-cathode glow-discharge diode having a copper anode and a large cathode of sodium or other material.
- A. Tunnel diode
- B. BARITT diode
- C. Anotron
- D. READ diode
- Correct Answer: Option C
Avalanche breakdown in a semiconductor takes place
- A. When forward current exceeds a certain value
- B. When potential barrier is reduced to zero
- C. When reverse bias exceeds a certain value
- D. When forward bias exceeds a certain value
- Correct Answer: Option C
At absolute zero temperature, a semiconductor behaves as a/an
- A. Good conductor
- B. Superconductor
- C. Insulator
- D. Variable resistor
- Correct Answer: Option C
What is the typical operating current of an LED?
- A. 50 mA
- B. 10 mA
- C. 20 mA
- D. 5 mA
- Correct Answer: Option B
What device uses a material catwhisker as its anode and is classified as a hot-carrier diode?
- A. PIN
- B. Point-contact diode
- C. Shockley diode
- D. Crystal diode
- Correct Answer: Option B
The creation voltage in a conductor or semiconductor by illumination of one surface
- A. Dember effect
- B. Skin effect
- C. Destriau effect
- D. Night effect
- Correct Answer: Option A
An effect that occurs within the entire bulk of a semiconductor material rather than in a localized region or junction
- A. Silicon effect
- B. Dember effect
- C. Bulk effect
- D. Destriau effect
- Correct Answer: Option C