The inductance of a coil will increase under all the following conditions except______________?
Correct answer: A. when more length for the same number of turns is provided
- A. when more length for the same number of turns is provided
- B. when the number of turns of the coil increase
- C. when more area for each turn is provided
- D. when permeability of the core increases
Explanation
For a coil, L = μN²A/l, so increasing the magnetic-path length l while keeping turns, area and permeability unchanged reduces inductance. Increasing turns, area, or permeability increases it.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Circuit Analysis
394 free Circuit Analysis MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Circuit Analysis questions
The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as__________?
The law that the induced e.m.f. and current always oppose the cause producing them is due to____________?
Mutually inductance between two magnetically-coupled coils depends on____________?
As per Faraday's laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it_______________?
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will_____________?
Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be_____________?