Inductance

Any conductor has

• some definite value of resistance

• some definite value of inductance

Any conductor can provide

• electric power

• induced voltage

Elements with a definite value of inductance

• are called inductors

• are called coils

• are called sources

The inductance of a coil depends upon

• its size

• its core

• its number of turns

An iron core

• increases the value of inductance

• decreases the value of inductance

The value of mutual inductance is measured

• in watts

• in henries

Induction by a varying current

• results from the change in current

• results from the change in the current value

The faster the current changes

• the lower the induced voltage

• the higher the induced voltage