Voltage Regulators Questions and Answers
Voltage Regulators questions with answers cover one of the most critical topics in electronics engineering — maintaining constant output voltage. These questions are highly relevant for electronics interview questions and answers, GATE preparation, and PSU exams like BHEL, DRDO, and ISRO. Understanding voltage regulators helps you analyze how electronic circuits stabilize voltage under varying load conditions. Through detailed MCQs and solutions, students can master linear, switching, and integrated voltage regulators efficiently. Practice these electronics-based aptitude tests to improve conceptual clarity and readiness for both academic and placement assessments.
Voltage Regulators
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49 questions
11. What is the ratio of the period of the output voltage to the period of the input voltage in a full-wave rectifier?
- 0
- 0.5
- 1
- 2
12. If the value of full-load voltage is the same as the no-load voltage, the voltage regulation calculated is ________ %, which is the best expected.
- 0
- 1
- 99
- 100
13. Calculate the ripple of a filter output having a 20-V dc component and a 1.7 Vr(rms) ac component.
- 6%
- 8.5%
- 85%
- 58%
14. A switching regulator that is configured as a voltage-inverter produces what type of output?
- an ac output with opposite phase to the input ac
- a dc output that is the negative of the dc input voltage
- an output that is a higher voltage than the input voltage
- an ac output from a dc input voltage
15. In Figure 17-1(a)(see question 6), the purpose of R1 is to
- provide a reference voltage.
- limit current through the diode.
- limit voltage to the op-amp.
- provide output voltage sampling.
16. For a full-wave rectifier with ac ripple at 120 Hz, the impedance of a capacitor can be calculated using XC = ________.
- 0.707 ÷ C
- 1.414 ÷ C
- 1.3 ÷ C
- 0.785 ÷ C
17. What is the purpose of an additional RC filter section in a power supply circuit?
- Increase the dc voltage component
- Increase the ac voltage component
- Decrease the ac voltage component
- None of the above
18. In which period is the capacitor filter charged in a full-wave rectifier?
- The time during the positive cycle
- The time during which the diodes are not conducting
- The time during which the diode(s) is (are) conducting
- The time during the negative cycle
19. The ________ regulator is less efficient than the ________ type, but offers inherent short-circuit protection.
- series, shunt
- shunt, series
20. In which of the following applications is a pulsating dc voltage suitable?
- Battery charger
- Radio
- Stereo system
- Computer