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
51. As a generator armature passes the 270 degree point, the induced voltage is:
- at maximum negative
- between maximum negative and zero
- at maximum positive
- between zero and maximum positive
52. A value of "ten to the eighth power magnetic lines of force" is for the term:
- field
- flux
- coulomb
- weber
53. A change of one ampere per second in an inductor that induces a voltage of one volt is considered as which unit value?
- a lenz
- an ohm
- a farad
- a henry
54. What is the name of the part inside a relay that is moved by the action of the electromagnet?
- armature
- conductor
- contacts
- solenoid
55. If the primary of a 4:1 turns transformer dissipates 5 W, what is the secondary power?
- 5.0 W
- 1.25 pW
- 9.5 W
- 20.0 mW
57. When used as a filter, an inductor is
- placed in series with the load and aids any current changes
- placed in parallel with the load and aids any current changes
- placed in parallel with the load and opposes any current changes
- placed in series with the load and opposes any current changes
58. A loaded transformer will achieve mutual induction when:
- secondary current increase causes a primary current decrease
- primary current is increased by an increase in secondary current
- primary current is decreased by an increase in secondary current
- secondary current decrease causes a primary current increase
59. Which transformer turns ratio is needed to match two 16-ohm parallel devices to an output of 22.2 ohms?
- 1.38:1
- 1.67:1
- 0.72:1
- 0.60:1
60. A transformer will have:
- primary and secondary windings
- primary and secondary current
- primary wattage producing secondary current
- different frequencies for the primary and secondary