Regulated DC Power Supply - EEE Questions and Answers

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In a 15 V Zener diode , the breakdown mechanism will occur by ___________

Avalanche mechanism

Zener mechanism

Both Zener and avalanche mechanism

None of the above

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A Zener diode utilises ___________ characteristic for voltage regulation

Forward

Reverse

Both forward and reverse

None of the above

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

Series current

Zener current

Load current

None of the above

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A power supply can deliver a maximum rated current of 0.5 A at full-load output voltage of 20 V. What is the minimum load resistance that you can connect across the supply?

10 Ω

20 Ω

15 Ω

40 Ω

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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?

3.09

2.87

5.72

None of the above

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In an unregulated power supply, if input a.c. voltage increases, the output voltage .

Increases

Decreases

Remains the same

None of the above