Inductance is the property of a conductor that opposes changes in current. A changing current through an inductor induces a voltage that resists the change.

How does a ferrite core affect inductance?

A ferrite core increases the effective permeability (mu = mu_r * mu_0), multiplying the inductance by the relative permeability mu_r of the core material.

What is the unit of inductance?

The henry (H), named after Joseph Henry. One henry means a current change of 1 A/s induces 1 volt.

Free Inductance Calculator

Calculate the inductance of a solenoid using L = mu0 * N² * A / length.

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Number of Turns

Cross-Sectional Area

m²

Solenoid Length

Inductance

0.000126 H

Inductance (mH)0.1257 mH

Inductance vs Number of Turns

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Solenoid Inductance

Inductance quantifies the ability of a coil to store energy in a magnetic field.

Formula

L = mu_0 * N² * A / l

where N is the number of turns, A is the cross-sectional area, and l is the solenoid length.

Example Calculation

A solenoid with 100 turns, area 0.001 m², length 0.1 m.

01L = mu_0 * N² * A / l
02L = 4*pi*1e-7 * 10000 * 0.001 / 0.1
03L = 1.2566e-3 * 0.01
04L = 1.2566e-5 H = 0.1257 mH

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