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?
Correct answer: D. 5%
- A. 10%
- B. 20%
- C. 15%
- D. 5%
Explanation
For an ordinary unregulated supply, the DC output changes approximately in proportion to the input, so a 5% input increase gives about a 5% output increase. A regulated supply would normally show a smaller change because regulation suppresses input variations.
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