On Wed, 16 Feb 2011 05:02:41 -0800, the renowned Rich Grise
wrote:

Spehro Pefhany wrote:
On Wed, 16 Feb 2011 02:28:02 -0800, the renowned Rich Grise
PrecisionmachinisT wrote:

DC circuits have zero impedance

No, they have zero _reactance_; the impedance is simply equal to
the resistance, which is the real component of impedance, which
is a complex number.

Sooo.. you're saying a (non faulty) capacitor has zero reactance at
DC?

Of course not, you nincompoop. A capacitor is an open circuit at DC,
so the concept of impedance is meaningless.

Actually, the _susceptance_ approaches zero as f-0
(susceptance is 1/reactance),

The reactance of an inductor approaches zero as f-0
(susceptance heads for the roof)

Hope This Helps!
Rich

Immensely, Rich. WTF are you doing up at 5AM CA time anyway?


Best regards,
Spehro Pefhany
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