18 Questions
What happens to the inductance of a coil as more layers are added?
It increases with each layer
What is the principle behind the operation of a transformer?
Mutual inductance
What is the term for the voltage induced in another electrically isolated conductor when a conductor's magnetic flux changes?
Mutual inductance
What is the primary factor that determines the amount of mutual inductance between two coils?
The relative positions of the two coils
How do the layers of an inductor coil interact with each other?
They are magnetically coupled together
What is the result of a change in flux in one coil when two coils are magnetically coupled?
An EMF is induced in the other coil
What is the primary purpose of the material in an inductor core?
To hold the shape of the coil
Which of the following physical factors affects the inductance of a coil?
The number of layers of winding in the coil
How does the inductance of a coil vary with the number of turns?
It increases with the square of the number of turns
What is the effect of doubling the number of turns in a coil on the induced voltage?
The induced voltage is quadrupled
What is the term for the flux field set up by one loop cutting another loop in a coil?
Self-inductance
Which of the following is NOT a factor affecting the inductance of a coil?
The color of the coil wire
What is the primary reason the magnetic core of Coil B is a better path for magnetic lines of force than the nonmagnetic core of Coil A?
The magnetic core of Coil B has a higher permeability.
What occurs when the permeability of the core material increases in a coil?
The inductance of the coil increases directly.
Why is Coil A a poor inductor compared to the others?
Its turns are widely spaced and there is no layering.
What is the effect of increasing the number of coil layers on the inductance of a coil?
It increases the inductance of the coil.
What is the primary reason Coil C is more inductive than Coil B?
It is wound in three layers.
What is the result of closely spaced turns in a coil?
It increases the flux linkage.
This quiz covers the principles of mutual inductance, including how layering affects inductance and the relationship between magnetic flux and induced voltage. It is a part of the CASA Part 66 training materials.
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