Inductors Questions and Answers
Inductors are essential components in electronics circuits that store energy in a magnetic field when electrical current flows through them. Understanding inductors is crucial for candidates preparing for GATE, ISRO, DRDO, and ECE placement exams, where aptitude questions and answers related to inductors frequently appear. These questions often test concepts like inductive reactance, energy storage, mutual inductance, and RL circuit behavior. Mastering these fundamentals helps in analyzing real-world circuit performance. This section provides electronics questions with answers and explanations on inductors, enabling learners to strengthen their concepts and prepare effectively for competitive exams. Practice these aptitude questions with detailed solutions to enhance your technical understanding and speed.
Inductors
11. What does Faraday's law concern?
- a magnetic field in a coil
- a magnetic field cutting a conductor
- a magnetic field hystersis
- a magnetic field in a conductor
12. The polarity of induced voltage while a field is collapsing is:
- independent of the force creating it
- opposite to the force creating it
- identical to the force creating the field
- present only if the force is stationary
14. Electromagnetism is the:
- magnetic field caused by a permanent magnet
- action between a permanent and an artificial magnet
- magnetic field action with a current-carrying wire
- current in the coil
15. A magnetic field has:
- polar fields
- lines of force
- magnetomotive force
- lines of reluctance
16. Which two values are plotted on a B-H curve graph?
- reluctance and flux density
- permeability and reluctance
- magnetizing force and permeability
- flux density and magnetizing force
17. What is the number of turns required in the secondary winding for a transformer when 120 volts is applied to a 2400-turn primary to produce 7.5 Vac at the secondary?
- 75 turns
- 150 turns
- 900 turns
- 1920 turns
18. The four factors determining inductance are the number of turns, coil length, coil area, and:
- permeability
- reluctance
- counter emf
- coefficient of coupling
19. The time difference, or lag, between flux density and magnetizing force is known as:
- eddy current
- magnetic saturation
- hysteresis
- coercivity
20. A magnetic circuit breaker will open to protect equipment only when:
- voltage is exceeded
- an open is in the equipment
- the equipment is operating properly
- current is exceeded