Regulated D.C. Power Supply

11. A Zener regulator __________… in the power supply

1. Increases the ripple
2. Decreases the ripple
3. Neither increases nor decreases the ripple
4. Data insufficient

View answer

12. A Zener voltage regulator is used for __________… load currents

1. High
2. Very high
3. Moderate
4. Small

View answer

13. A Zener voltage regulator will cease to act as a voltage regulator if Zener current becomes __________

1. Less than load current
2. Zero
3. More than load current
4. None of the above

View answer

14. An ideal regulated power supply is one which has voltage regulation of __________

1. 0%
2. 5%
3. 10%
4. 1%

View answer

15. Another name for Zener diode is __________ diode

1. Breakdown
2. Voltage
3. Power
4. Current

View answer

16. As the junction temperature increases, the voltage breakdown point for avalanche mechanism __________

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

View answer

17. 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

View answer

18. Commercial power supplies have voltage regulation __________

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

View answer

19. For increasing the voltage rating, zeners are connected in …__________

1. Parallel
2. Series-parallel
3. Series
4. None of the above

View answer

20. If the doping level is increased, the breakdown voltage of the Zener …__________

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

View answer