Zener Diode MCQ Questions with Answers
Contents
- 1 A Zener diode is designed for operation in the
- 2 Zener diode can be best defined as
- 3 To reduce the breakdown voltage a zener diode is
- 4 Zener diodes that are having breakdown voltages of less than 5 V operate predominately in
- 5 Zener diodes that are having breakdown voltages greater than 5 V operate predominately in
- 6 Under normal operations a zener diode maintains
- 7 If IK = Zener knee current and IM = Zener maximum current, then to maintain constant voltage across a Zener diode should operate when it current value is
- 8 The maximum power rating of a zener diode has 500 mW at 50°C and a derating factor of 2.2 mW/°C. The maximum power zener can dissipate at a temperature of 70°C is
A Zener diode is designed for operation in the
A Zener diode is designed for operation in the:
- Forward bias region
- Reverse bias region on right side of knee voltage
- Reverse-breakdown region
- None of these
Correct answer: 3. Reverse-breakdown region
Zener diode can be best defined as
Zener diode can be best defined as:
- Voltage clipper
- Voltage clamper
- Voltage regulator
- Power diode
Correct answer: 3. Voltage regulator
To reduce the breakdown voltage a zener diode is
To reduce the breakdown voltage a zener diode is:
- Lightly doped
- Moderately doped
- Heavily doped
- None of above
Correct answer: 3. Heavily doped
Zener diodes that are having breakdown voltages of less than 5 V operate predominately in
Zener diodes that are having breakdown voltages of less than 5 V operate predominately in:
- Avalanche breakdown
- Zener breakdown region
- Both of these
- None of these
Correct answer: 2. Zener breakdown region
Zener diodes that are having breakdown voltages greater than 5 V operate predominately in
Zener diodes that are having breakdown voltages greater than 5 V operate predominately in:
- Avalanche breakdown
- Zener breakdown region
- Both of these
- None of these
Correct answer: 1. Avalanche breakdown
Under normal operations a zener diode maintains
Under normal operations a zener diode maintains
- Nearly constant voltage across its terminals
- Pulsating voltage across its terminals
Correct answer: 1. Nearly constant voltage across its terminals
If IK = Zener knee current and IM = Zener maximum current, then to maintain constant voltage across a Zener diode should operate when it current value is
If IK = Zener knee current and IM = Zener maximum current, then to maintain constant voltage across a Zener diode should operate when it current value is
- Lesser than IK
- Lesser than IM, but greater than IK
- Greater than IK and IM
- Greater tahan IK and IM both
Correct answer: 2. Lesser than IM, but greater than IK
The maximum power rating of a zener diode has 500 mW at 50°C and a derating factor of 2.2 mW/°C. The maximum power zener can dissipate at a temperature of 70°C is
The maximum power rating of a zener diode has 500 mW at 50°C and a derating factor of 2.2 mW/°C. The maximum power zener can dissipate at a temperature of 70°C is:
- 228 mW
- 456 mW
- 624 mW
- 1099 mW
Correct answer: 2. 456 mW
Solution:
PD(derated) = PD(max) – (mW/°C) *ΔT
= 500 mW – (2.2 mW/°C)( 70°C – 50°C)
= 456 mW