Question: In a 15 V Zener diode , the breakdown mechanism will occur by ______________?

• 1. Avalanche mechanism
• 2. Zener mechanism
• 3. Both Zener and avalanche mechanism
• 4. None of the above

Question: As the junction temperature increases, the voltage breakdown point for Zener mechanism _______________?

• 1. Is increased
• 2. Is decreased
• 3. Remains the same
• 4. None of the above

Question: A Zener diode utilises_____________characteristic for voltage regulation?

• 1. Forward
• 2. Reverse
• 3. Both forward and reverse
• 4. None of the above

Question: Commercial power supplies have voltage regulation ______________?

• 1. of 10%
• 2. of 15%
• 3. of 25%
• 4. within 1%

Question: In an unregulated power supply, if input a.c. voltage increases, the output voltage _______________?

• 1. Increases
• 2. Decreases
• 3. Remains the same
• 4. None of the above

Question: In an unregulated power supply, if load current increases, the output voltage _____________?

• 1. Remains the same
• 2. Decreases
• 3. Increases
• 4. None of the above

Question: A power supply which has voltage regulation of ____________ is unregulated power supply?

• 1. 0 %
• 2. 5 %
• 3. 10 %
• 4. 8%

Question: An ideal regulated power supply is one which has voltage regulation of________________?

• 1. 0%
• 2. 5%
• 3. 10%
• 4. 1%

Question: The rupture of co-valent bonds will occur when the electric field is__________________?

• 1. 100 V/cm
• 2. 6 V/cm
• 3. 1000 V/cm
• 4. More than 105 V/cm

Question: When an SCR is turned on, the voltage across it is about _____________?

• 1. Zero
• 2. 10 V
• 3. 1 V
• 4. 1 V