**Date:** Thu Mar 12 11:21:00 2009
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**Author:** Bernard Cleyet

**Subject:** Re: stereo speakers

**Post:**

NOT! Only when the resistance real or complex is non linear is ohms

law "violated". In that case the system is "low-fidelity".

Nonlinearity results in distortion -- not HI-Fi!

I agree students should crawl before running, except in exceptional

cases. Therefore, use low real (as opposed to complex) internal

resistance sources and "pure" resistors as the load. Then introduce

complex and non linear loads (reactive, extrinsic and intrinsic non-

linear ones). Measuring the impedance of speakers and amplifier

internal or source impedance is an excellent exercise once the

students have a good apprehension of ohms law in simple and complex

cases. This makes a great "exploration" lab.

http://en.wikipedia.org/wiki/Ohm's_law#Transients_and_AC_circuits

bc

On 2009, Mar 12, , at 05:23, Anthony Lapinski wrote:

> I was hoping to do some basic

> math problems for these situations, but Ohm's law can't really be

> applied.

>

From tap-l-owner@lists.ncsu.edu Thu Mar 12 11:21:00 2009