Inductors and Inductance

Disambiguation: Not to be confused with Mathematical Induction

This note focuses on the use of an inductor. For the physics behind an inductor, see Inductance.

Inductance

Definition

Something about storing energy in a magnetic field when current travels through it. Inductivity is measured in henries, and it is customary to use the symbol for inductance.

Inductor

Usually an insulated wire wound in a coil.

Voltage Drop

Definition

It is shown from experiment that when a current of passes through a resistor of resistance , the voltage drop across the resistor is:

(see Trig Functions, Working with Sines and Cosines).

For Inductors

Inductors and Inductance

Recall . This becomes

(see Euler's Formula)

Recall

Law