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Regulated DC Power Supply MCQ Questions & Answers | Electrical Engineering

Learn Regulated DC Power Supply MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Regulated DC Power Supply MCQ question is the important chapter for a Electrical Engineering and GATE students. Page-2 section-1

11
Two similar 15 V Zeners are connected in series. What is the regulated output voltage?
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Answer & Solution
Answer: Option C
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12
An ideal regulated power supply is one which has voltage regulation of ___________
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Answer: Option A
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13
If the input a.c. voltage to regulated or ordinary power supply increases by 5% what will be the approximate change in d.c. output voltage?
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Answer: Option D
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14
The load voltage is approximately constant when a Zener diode is ___________
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Answer: Option D
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15
A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage?
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Answer: Option A
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16
In a regulated power supply, two similar 15 V zeners are connected in series. The input voltage is 45 V d.c. If each Zener has a maximum current rating of 300 mA, what should be the value of the series resistance?
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Answer: Option B
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17
As the junction temperature increases, the voltage breakdown point for Zener mechanism ___________
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Answer: Option B
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18
As the junction temperature increases, the voltage breakdown point for avalanche mechanism ___________
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Answer: Option C
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19
For increasing the voltage rating, zeners are connected in ___________
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Answer: Option C
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20
When load current is zero, the Zener current will be
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Answer: Option C
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