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Inductors

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Inductors MCQ & Objective Questions

Inductors are a crucial component in the study of electromagnetism and electrical circuits, making them an important topic for students preparing for exams. Understanding inductors not only helps in grasping core concepts but also enhances your ability to tackle MCQs effectively. Practicing objective questions related to inductors can significantly improve your exam preparation and boost your confidence in answering important questions.

What You Will Practise Here

  • Definition and basic principles of inductors
  • Types of inductors and their applications
  • Key formulas related to inductance and energy stored
  • Inductor behavior in AC and DC circuits
  • Self-inductance and mutual inductance concepts
  • Diagrams illustrating inductor circuits
  • Real-world applications of inductors in technology

Exam Relevance

Inductors are frequently featured in various examinations, including CBSE, State Boards, NEET, and JEE. Students can expect questions that test their understanding of inductance, circuit behavior, and practical applications. Common question patterns include numerical problems, conceptual MCQs, and theoretical questions that require a clear understanding of the principles governing inductors.

Common Mistakes Students Make

  • Confusing self-inductance with mutual inductance
  • Misapplying formulas related to inductance in circuit problems
  • Overlooking the significance of inductors in AC circuits
  • Failing to interpret circuit diagrams correctly

FAQs

Question: What is an inductor?
Answer: An inductor is a passive electrical component that stores energy in a magnetic field when electric current flows through it.

Question: How does an inductor behave in an AC circuit?
Answer: In an AC circuit, an inductor opposes changes in current, causing a phase difference between voltage and current.

Now is the time to enhance your understanding of inductors! Dive into our practice MCQs and test your knowledge to excel in your exams. Remember, consistent practice with objective questions will pave the way for your success!

Q. In a circuit with an inductor, what is the time constant defined as?
  • A. L/R
  • B. R/L
  • C. L*R
  • D. R+L
Q. In a series RL circuit, what happens to the current when the voltage is suddenly applied?
  • A. It instantly reaches maximum value
  • B. It increases linearly
  • C. It increases exponentially
  • D. It remains constant
Q. In a series RL circuit, what is the phase relationship between voltage and current?
  • A. Voltage leads current by 90 degrees
  • B. Current leads voltage by 90 degrees
  • C. Voltage and current are in phase
  • D. Voltage lags current
Q. In a transformer, what role does the inductor play?
  • A. It converts AC to DC
  • B. It stores energy
  • C. It transfers energy between circuits
  • D. It filters signals
Q. What happens to the current through an inductor when the voltage is suddenly removed?
  • A. It instantly drops to zero
  • B. It continues to flow for a short time
  • C. It reverses direction
  • D. It increases indefinitely
Q. What happens to the energy stored in an inductor when the current through it is suddenly interrupted?
  • A. It is dissipated as heat
  • B. It is stored indefinitely
  • C. It is released as a voltage spike
  • D. It is converted to light
Q. What is the behavior of an inductor at high frequencies?
  • A. It acts as a short circuit
  • B. It acts as an open circuit
  • C. It has no effect
  • D. It increases resistance
Q. What is the effect of increasing the number of turns in an inductor?
  • A. Inductance decreases
  • B. Inductance remains the same
  • C. Inductance increases
  • D. Inductance becomes zero
Q. What is the primary application of inductors in power supply circuits?
  • A. Filtering
  • B. Rectification
  • C. Amplification
  • D. Switching
Q. What is the primary function of an inductor in a circuit?
  • A. To store electrical energy in a magnetic field
  • B. To convert AC to DC
  • C. To amplify signals
  • D. To rectify voltage
Q. What is the primary reason inductors are used in power supply circuits?
  • A. To filter out high frequencies
  • B. To store energy
  • C. To regulate voltage
  • D. To convert AC to DC
Q. What is the primary use of a choke inductor?
  • A. To filter out high-frequency signals
  • B. To amplify signals
  • C. To rectify AC voltage
  • D. To store energy
Q. What is the time constant for an RL circuit defined as?
  • A. L/R
  • B. R/L
  • C. L*R
  • D. 1/(L*R)
Q. What type of inductor is commonly used in RF applications?
  • A. Air core inductor
  • B. Iron core inductor
  • C. Ferrite core inductor
  • D. Water core inductor
Q. Which of the following components is typically used to oppose changes in current?
  • A. Capacitor
  • B. Resistor
  • C. Inductor
  • D. Diode
Q. Which of the following describes the behavior of an inductor in a DC circuit after a long time?
  • A. It acts as a short circuit
  • B. It acts as an open circuit
  • C. It stores energy
  • D. It dissipates energy
Q. Which of the following is a key characteristic of inductors?
  • A. They have a high resistance to AC signals
  • B. They oppose changes in current
  • C. They can only be used in DC circuits
  • D. They have no effect on frequency
Q. Which type of inductor is designed to operate at high frequencies?
  • A. Air core inductor
  • B. Iron core inductor
  • C. Ferrite core inductor
  • D. Variable inductor
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