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Date: | Mon, 16 Jan 2012 12:56:47 -0700 |
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scott:
Once you have solved for R, and L, just square those numbers...this is
simply multiplying the number by itself to square it.
Then plug those figures in and solve.
you can do it on a regular calculator.
Also, and this shows my ignorance because I haven't studied much for this,
why do you need to expand micro henries and peako ferrads? Can't you leave
them like that and plug them into the equation like they are to get the
answer you want?
73
Colin, V A6BS
----- Original Message -----
From: "Scott Howell" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, January 16, 2012 8:06 AM
Subject: requesting help with math question
> All,
>
> Ok, I'm studying away here and trying to master the material for the =
> Extra class exam. I have to admit that my math skills are not the best, =
> but in my defense I have not done such fun stuff when in school and =
> certainly never took much algebra. So, I'm admitting my mathematical =
> ignorance here and asking for a little mercy. grin
> I want to understand how best to work out these problems because =
> remembering the answers is probably almost as much work. grin
> So, here is the question and this is dealing with resonance.
> The forumla f sub r =3D r squared times l squared.
> So, f is the resonant frequency and I got that and that is what I need =
> to solve for.
> So, r is 50 micro henrys and l is 200 pico farads.
> I understand that I need to convert micro henrys to henrys and pico =
> farads to farads. I gather multiplying 50 times 10 to minus 6 gets the =
> job done and doing this on a calculator would be 50 times 10 (press the =
> x y button) -6.
> You would do the same for converting pico farads to farads.
> However, at this point I'm not quite sure how to work out the rest and =
> of course entering this into a scientific calculator is really important =
> and would make the process a bit easier.
> I realize the end result will be an answer that is in megahertz. If =
> anyone could help with this I would really appreciate it. The electrical =
> theory portion of the exam is going to be the difficult part for me. =
> RUles etc. no problem, but this stuff which I'm sure is going to be a =
> big part of the exam is going to be the make or break for me.
>
> thanks,
> 73
> Scott/N3BYY=
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