Re: Presenting complex numbers at secondary level
- From: "Brian Reay" <see@xxxxxxxxxxxxxxx>
- Date: Fri, 11 Nov 2005 23:08:25 GMT
"A" <a@xxxxxxxxxxxx> wrote in message news:4374ffde$1_1@xxxxxxxxxxxxxxxxxxxx
>
> Similarly, it could easily take a year of university
> instruction before a student is prepared to understand
> how complex numbers are useful in electricity.
>
Would it?
Maybe if you were to look at poles and zeros etc, but if you just looked at
resistance and reactance would that be beyond secondary level? Simple 2D
plot with resistance as x axis, +/- y as reactances (L and C), bit of
Pythag to get the magnitude, a+bi (or bj I suppose) to (r,Theta) onversion.
The significance of reactance and phase relationships isn't too hard to
grasp and bit of Ohms Law (taught at secondary level) should see you home.
Ties in nicely with unit vector work taught at this level.
--
73
Brian, G8OSN
www.g8osn.org.uk
.
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