I need to learn this once and for all...

[Ryan Richards (Diesel Bre]

Ive tried to learn how voltage, current, resistance, etc. work but, I could
never understand it coming thru the mouth of a professor.... Does anyone
know a website that can explain it fairly simple???

Thanks,
Ryan Richards

 

[Russell Miller]

Ryan Richards (Diesel Breath) wrote:

Ive tried to learn how voltage, current, resistance, etc. work but, I
could never understand it coming thru the mouth of a professor.... Does
anyone know a website that can explain it fairly simple???

Thanks,
Ryan Richards

http://www.ibiblio.org/obp/electricCircuits/

This is not a simple topic, and you'll have to make some effort. But this
resource has my wholehearted recommendation.

--Russell

 

[grahamk]

Ryan Richards (Diesel Breath) wrote:

Ive tried to learn how voltage, current, resistance, etc. work but, I
could never understand it coming thru the mouth of a professor....
Does anyone know a website that can explain it fairly simple???

Thanks,
Ryan Richards

Have a look at

Beginners and Intermediate Electronics
http://homepage.ntlworld.com/g.knott/index.htm

 

[John Popelish]

"Ryan Richards (Diesel Breath)" wrote:

Ive tried to learn how voltage, current, resistance, etc. work but, I could
never understand it coming thru the mouth of a professor.... Does anyone
know a website that can explain it fairly simple???

Thanks,
Ryan Richards

Here is the one minute course.

Voltage is the (electrical) pressure difference between two points in
a circuit that causes movement of (applies force to) charge. The
movement of charge (electrons, ions, etc.) is current. In material
that allows charge to move in proportion to the force the
proportionality between voltage and current is called resistance. So
if there is a voltage drop (difference) of 10 volts across the two
terminals of a resistor (a device that allows a current of charge to
pass that is proportional to the voltage across it) and the current is
..01 ampere, then the resistance is said to be

(10 volts)/(.01 ampere)=1000 ohms.

Many devices and materials do not allow a current that is proportional
to the applied voltage, and these are referred to as non ohmic
materials or devices.
Rectifier diodes are an example of a non ohmic device because they
pass a large current when a small voltage is applied in one direction,
but pass only a small current when a large voltage is applied in the
other direction.

--
John Popelish

 

[Dr. Anton Squeegee]

In article <9Tcib.19874$_f.6298@news1.central.cox.net>, "Ryan Richards
\(Diesel Breath\)" <ryan@dieselbreath.com> says...

Ive tried to learn how voltage, current, resistance, etc. work but, I could
never understand it coming thru the mouth of a professor.... Does anyone
know a website that can explain it fairly simple???

Other posters have explained the theory side in good detail. What
I'm going to give you is a mental analogy that may help you to actually
picture what's going on. Personally, this helped me tremendously during
my initial studies many moons ago.

Think of a wire as a water-filled pipe or hose. 'Voltage' is the
difference in pressure between one end of the hose and the other.
'Current' is the volume of water through the hose. 'Resistance' is what
the hose produces in terms of friction in resisting the water flow.

In other words, you can only apply so much pressure (voltage) to
support a given flow (current) given the diameter (resistance) of the
hose. If the hose is kinked along its length, resistance increases, and
it takes more pressure (voltage) to force the same volume (current)
through the same hose.

If the group's other posters want to expand or correct any of the
above, feel free. ;-)

Hope that helps. Good luck in your studies.


--
Dr. Anton Squeegee, Director, Dutch Surrealist Plumbing Institute
(Known to some as Bruce Lane, KC7GR)
kyrrin a/t bluefeathertech d-o=t c&o&m
"Quando Omni Flunkus Moritati" (Red Green)

 

[Baphomet]

"Ryan Richards (Diesel Breath)" <ryan@dieselbreath.com> wrote in message
news:9Tcib.19874$_f.6298@news1.central.cox.net...

Ive tried to learn how voltage, current, resistance, etc. work but, I
could
never understand it coming thru the mouth of a professor.... Does anyone
know a website that can explain it fairly simple???

Another good basic site is: http://homepage.ntlworld.com/g.knott/

 

[Jim Large]

Ryan Richards (Diesel Breath) wrote:

Ive tried to learn how voltage, current,
resistance, etc. work but, I could never
understand it coming thru the mouth of a
professor.... Does anyone know a website
that can explain it fairly simple???

Not a web site, but try Chapter 1 of The Art of
Electronics.

http://www.amazon.com/exec/obidos/ASIN/0521370957/

It isn't cheap. Maybe if you're lucky your local
library will have a copy.

-- Jim L.