Re: question on instantaneous power

Ed Casas (edc@ece.ubc.ca) Tue, 29 Feb 2000 12:54:10 -0800 

Date: Tue, 29 Feb 2000 12:54:10 -0800
From: Ed Casas <edc@ece.ubc.ca>
Subject: Re: question on instantaneous power



On Tue, Feb 29, 2000 at 04:20:22AM -0500, Anita Lei wrote:

> Does anyone know why we have to take the square root of the
> power in Example 4.3 on p.152 when looking for ai?

We are computing the vector sum of two voltages.  Taking the
square root of the power gives us a quantity that is proportional
to the voltage.

-- 
Ed Casas   edc@ece.ubc.ca   http://casas.ece.ubc.ca   +1 604 822-2592