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what is inductance?...i need a physical meaning and not equations!

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- Thread starter hisham.i
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- #1

- 176

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what is inductance?...i need a physical meaning and not equations!

- #2

collinsmark

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what is inductance?...i need a physical meaning and not equations!

There's more than one way to think about inductance. Here is one such way, as applied to an inductor in a circuit.

Inductors tend to resist

The emf (aka Voltage) across the terminals of an inductor are a result of this. The inductor produces an emf in such a way that the overall circuit tends to resist any

I know you didn't want any equations, but I'm going to give you one anyway. The induced Voltage, emf, across an inductor is:

[tex] V_{emf} = L \frac{di}{dt} [/tex]

where

So the magnitude of which a component resists change in current is called its inductance.

As a mechanical analogy, think of Newton's laws. An object in motion tends to stay in motion, unless acted upon by an outside force. The amount which a body tends to resist changes in motion is proportional to its mass. Inductors do the same thing, except replace motion with current. The amount that it resists changes in current is proportional to its inductance.

(btw.,

- #3

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Here is a physics explanation. In an inductor there is a magnetic field. The magnetic field is proportional to the inductor current. The magnetic field represents stored energy. The amount of stored magnetic energy is proportional to the square of the magnetic field** times its volume. The magnetic field (energy) can be in air, ferrite, laminated iron, etc.

** divided by the permeability of the material.

Bob S

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