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
2. Voltage regulators keep a constant ________ output voltage when the input or load varies within limits.
- dc
- ac
- ripple
- [NIL]
3. Calculate the ripple voltage of a full-wave rectifier with a 75-F filter capacitor connected to a load drawing 40 mA.
- 1.20 V
- 1.28 V
- 1.32 V
- 1.41 V
4. In which period is the capacitor filter discharged through the load 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
6. What is the range of the voltage level of the LM317 adjusted voltage regulator?
- 0 V to 5 V
- 1.2 V to 37 V
- –5 V to –24 V
- 5 V to 24 V
7. Calculate the voltage regulation of a power supply having VNL = 50 V and VFL = 48 V.
- 4.17%
- 5.2%
- 6.2%
- 7.1%
8. Switching regulator efficiencies can be greater than ________ percent.
- 60
- 70
- 80
- 90
10. What is the typical dropout voltage for the 7812 fixed positive voltage regulator?
- 4 mV
- 100 mV
- 1.5 V
- 2 V