Welcome to Voltage Regulator NEET MCQ, In this specially curated collection of multiple-choice questions (MCQs) designed for NEET (National Eligibility-cum-Entrance Test) preparation, each question is thoughtfully paired with both the correct answer and a detailed explanation. These MCQs are designed to not only assess your knowledge of voltage regulation but also to deepen your understanding of this crucial topic.
1. What is the primary purpose of a voltage regulator?
Answer:
Explanation:
The fundamental role of a voltage regulator is to provide a consistent output voltage regardless of variations in input voltage or load conditions.
2. Which of the following is NOT a type of voltage regulator?
Answer:
Explanation:
Common types of voltage regulators include linear, switching, and transformer-based regulators. There isn't a specific type called a "capacitor voltage regulator."
3. Linear voltage regulators work primarily through:
Answer:
Explanation:
Linear voltage regulators use feedback mechanisms to constantly adjust and maintain the desired output voltage.
4. Why are switching regulators more efficient than linear regulators?
Answer:
Explanation:
Switching regulators operate by switching the input current on and off rapidly, resulting in reduced heat dissipation and increased efficiency.
5. A Zener diode can be used in:
Answer:
Explanation:
A Zener diode can act as a voltage reference in linear voltage regulators due to its characteristic breakdown voltage.
6. Which voltage regulator is suitable for high output currents?
Answer:
Explanation:
Switching regulators are better suited for applications requiring high output currents due to their higher efficiency and reduced heat dissipation.
7. Voltage regulators are essential components in:
Answer:
Explanation:
Voltage regulators play a pivotal role in devices like mobile phones and refrigerators to ensure the circuits receive a consistent voltage supply.
8. Voltage regulators that use inductors and capacitors for energy storage are:
Answer:
Explanation:
Switching regulators utilize inductors and capacitors to store and release energy, ensuring consistent output voltage.
9. Dropout voltage refers to:
Answer:
Explanation:
Dropout voltage specifies the minimum difference needed between input and output voltages for the regulator to function effectively.
10. An advantage of linear regulators over switching regulators is:
Answer:
Explanation:
Linear regulators offer a simpler design and generate lesser noise compared to switching regulators.
11. In a voltage regulator circuit, the load regulation is a measure of:
Answer:
Explanation:
Load regulation indicates how effectively a regulator maintains its output voltage with varying load conditions.
12. The primary component responsible for voltage regulation in a linear regulator is:
Answer:
Explanation:
In a linear regulator, the transistor acts as a variable resistor, adjusting its resistance to maintain a consistent output voltage.
13. Switching regulators are known to produce:
Answer:
Explanation:
The rapid on-off switching in switching regulators can produce harmonics, potentially causing interference in other electronic devices.
14. Which of the following is an advantage of using a transformer-based voltage regulator?
Answer:
Explanation:
Transformer-based regulators can either increase (step-up) or decrease (step-down) the voltage level, making them versatile.
15. In the context of voltage regulators, ripple refers to:
Answer:
Explanation:
Ripple denotes the small, undesired residual periodic variations in the output voltage.