Topic 6: Inductors

Question 1

How is an inductor formed?

Answer 1

An inductor is formed by winding a metallic wire around an iron core.

Question 2

What are the 2 types of inductors?

Answer 2

The two types of inductors are:
Solenoid: cylindrical shape
Toroid: circular shape

Question 3

What is generated by an electrical field?

Answer 3

An electric field and the flow of electrical charges generates a magnetic field.

Question 4

How is a magnetic field represented/visualised?

Answer 4

A magnetic field is represented/visualised as circles around the wire/inductor.
Circles will have arrows which indicate the direction of the magnetic field.

Question 5

What is the measurement of the total magnetic field which passes through a certain area?

Answer 5

Magnetic flux is the measurement of the total magnetic field which passes through a certain area.
Denoted by Φ (Phi)

Question 6

With an inductor, if there are more turns/windings is the magnetic field stronger or weaker?

Answer 6

The magnetic field gets stronger with more turns and windings. This is because the magnetic field of each individual winding adds together, thus creating a stronger magnetic field.

Question 7

What is the V-I Characteristic of an inductor when given the current through the inductor?

Answer 7

v = L [(di)/(dt)]

where L is inductance