Inductance Flashcard

Front

What is an inductor used for in audio systems?

Back

An inductor is used in series with a woofer to produce low frequencies.

Front

What do inductors store energy in?

Back

Inductors store energy in the magnetic field around them.

Front

What happens when the magnetic field around an inductor collapses?

Back

A large electromotive force is produced.

Front

What is the inductance of an inductor?

Back

The inductance of an inductor is the ratio of the induced back-emf to the rate of change of current.

Front

What is the unit of electromotive force?

Back

Volt.

Front

How is energy stored in an inductor calculated?

Back

Energy (E) stored in an inductor is calculated using the formula E = 0.5 * L * I^2, where L is inductance and I is current.

Front

If 50 A flows through a 20 H inductor, how much energy is stored?

Back

25000 J.

Front

What is the formula for calculating inductance?

Back

Inductance (L) is calculated as L = (N * Φ) / I, where N is the number of turns, Φ is the magnetic flux, and I is the current.

Front

What is back-emf in an inductor?

Back

Back-emf is the electromotive force generated in an inductor due to a change in current.

Front

What is the relationship between inductance and frequency?

Back

Inductance opposes changes in current, which affects the frequency response of circuits.