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.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Electronics and Devices
758 free Electronics and Devices MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electronics and Devices questions
Two similar 15 V Zeners are connected in series. What is the regulated output voltage ?
The Zener current will be minimum when_____________?
A Zener regulator _____________ in the power supply?
The load voltage is approximately constant when a Zener diode is ________________?
If the load current drawn by unregulated power supply increases, the d.c. output voltage _____________?
In a loaded Zener regulator, which is the largest Zener current ?