Question: If the load current drawn by unregulated power supply increases, the d.c. output voltage _____________?

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

Question: If the load current drawn by unregulated power supply increases, the d.c. output voltage______________?

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

Question: In a loaded Zener regulator, which is the largest Zener current ?

• 1. Series current
• 2. Zener current
• 3. Load current
• 4. None of the above

Question: Which of these is the best description for a Zener diode ?

• 1. It is a diode
• 2. It is a constant current device
• 3. It is a constant-voltage device
• 4. It works in the forward region

Question: If the load resistance decreases in a Zener regulator, then Zener current ______________?

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

Question: A Zener diode______________?

• 1. Is a battery
• 2. Acts like a battery in the breakdown region
• 3. Has a barrier potential of 1 V
• 4. Is forward biased

Question: A 30 V Zener will have depletion layer width_______________ that of 10 V Zener?

• 1. More than
• 2. Less than
• 3. Equal to
• 4. None of the above

Question: What is true about the breakdown voltage in a Zener diode ?

• 1. It decreases when load current increases
• 2. It destroys the diode
• 3. It equals current times the resistance
• 4. It is approximately constant

Question: A 5 mA changes in Zener current produces a 50 mA change in Zener voltage. What is the Zener impedance ?

• 1. 1 O
• 2. 1 O
• 3. 100 O
• 4. 10 O

Question: A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation ?

• 1. 09%
• 2. 87 %
• 3. 72 %
• 4. None of the above