Hobby Electronics Basics Newbie needs help with basics

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Subject Author Date
Newbie needs help with basics hdjim69 03-16-06
Posted by hdjim69 on March 16, 2006, 7:21 am
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Hi, I'm trying to learn electronics, I'm right at the beginning,
just learned Ohms law and Watts law. I understand both. I understand
how to calculate both. However, I went to this tutorial on
Electronicsworkbench.com and I'm confused about how they come up with
these numbers.

In this example there is a series circuit with a 15v battery, a 10w/12v
light bulb with a voltmeter reading the voltage across the bulb and you
have to choose between 3 different resistors that will enable the bulb
to light - 1ohm, 100ohm and 5ohm. If you connect the 1ohm, the
voltmeter reads 15volts. How can that be ? In a series circuit each
load has some resistance and the sum of all the loads must equal the
source. So, what about the resistor ? It has to drop some voltage but
according to this, it's dropping zero. And if you connect the 100
ohm resistor, the voltmeter reads 1.88v. How did they come up with
that number ? And the 5ohm reads 12v across the voltmeter. But
according to Ohms law, E = IxR, if the resistor is 5ohms and the source
is 15v, then 15/5 = 3amps, that part I get but they are saying it's
dropping 3 volts ?? huh? Again, how did they get that value ?


http://www.electronicsworkbench.com/understandelectricity/ewb.html

TIA,

J


Posted by Phil Allison on March 16, 2006, 7:31 am
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"hdjim69"
>
> http://www.electronicsworkbench.com/understandelectricity/ewb.html



** Which EW **activity** in the above URL are you FUCKING on about
!!!!!!!!


DO NOT POST AMBIGUOUS QUESTIONS !!!






....... Phil






Posted by hdjim69 on March 16, 2006, 7:49 am
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Hey Phil, chill out !! The link should have taken right to the
problem. It's Activity 1 exercise 2.


Posted by Phil Allison on March 16, 2006, 8:02 am
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> Hey Phil, chill out !!


** WELL FUUUCK YOU !!!

Mr Googlegroups, anonymous "hotmail" SHITHEAD !!!!

SCUM of THE EARTH TROLL !!!



> The link should have taken right to the
> problem.



** Would anyone complain if it FUCKING DID ??

YOU fucking ASSHOLE !!





....... Phil




Posted by James Douglas on March 16, 2006, 7:34 pm
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Phil Allison wrote:
>
>> Hey Phil, chill out !!
>

Jeesh, go to your doctor and get the pine cone out of your ass!
BTW, I read various newsgroups that relate to my hobbies and I think
your dad, or maybe your bother, is in alt.design.grapics where his every
reponse is angry and seems to be written by a high schooler that has
spend 5-6 years there.

I would rather see 100+ simple questions than one of your posts, like
you mom probably said, or maybe not, if you have nothing good to say,
don't say anything at all.

To the original poster, sorry about this and simply ignore, there are
plenty of good folks both here and other news groups.

JimD


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