Inductors

Question 1

Define an inductor

Answer 1

A passive component that stores energy in the form of magnetic energy when a current flows through it.

Question 2

Define inductance

Answer 2

The ratio of the voltage to the rate of change of current

Question 3

How are inductors used as filters

Answer 3

The input signal frequency can be limited by an inductor and capacitor acting as a filter.
When frequency increases, the inductors impedance increases.

Question 4

How are inductors used with ferrite beads

Answer 4

Inductors in ferrite beads reduce frequency of radio interference

Question 5

What is the energy stored in an inductor

Answer 5

W = 0.5 L I^2

Question 6

Name 2 types of inductors

Answer 6

Ferromagnetic-cored inductor
Variable conductor

Question 7

Define the coupling coefficient for an inductor

Answer 7

The ‘amount’ of coupling between 2 coils of inductors.
example: 2 coils close together transfer energy from one to the other which are “tightly coupled”

Question 8

Give an example of a practical use of an inductor

Answer 8

Used to reduce ripple voltage in the output of a rectifier circuit

Question 9

What are some uses of RL circuits?

Answer 9

Radio wave transmitters
Amplifiers
Filters