Is this Ohm's law?

[v0031]

Using equipment of his own creation, Ohm determined that the current that flows through a wire is proportional to its cross sectional area and inversely proportional to its length or Ohm's law.

欧姆用自创的设备，证明了通过一段电线的电流和它的横截面成正比，和电线的长度成反比。

Is above Ohm's law? Different from what I was taught.

I'm not sure if my translation is correct or not.

[dead0man]

The only thing I remember about Ohm's Law is PIE.  Power (in watts) is equal to current (in amps) times voltage (in volts).  The USAF spent a lot of money putting a bunch of sh**t related to it in my head, but it doesn't seem to have stuck.

but what you wrote sounds good too.  It's the first line at wikipedia.

[muon2]

The most traditional form of Ohm's law is I = V / R, where I is the current, V (or E) is the electric potential (called voltage or rarely in the US electric tension), and R is the resistance. In this form one would say that the current in a wire is proportional to the applied potential (or voltage) and inversely proportional to the resistance.

Ohm's initial experiments did not identify the resistance as a separate quantity. He found that for a fixed potential the current was proportional to the cross-sectional area and inversely proportional to the length. If the translation added the phrase that I put in bold, it would be more accurate to the work done by Ohm.

dead0's memory is good, but it is an application of Ohm's law to power. The power dissipated by a resistive element in a circuit is P = I²R. If you substitute Ohm's law (I = V/R) into this equation and use E (electromotive force) for V (voltage) you get P = IE.

[dead0man]

It seemed really important at the time, and then has come up so rarely in real life (and long ago at that), that I've forgotten how it all works.  The safety stuff comes up, when to respect electricity, when not to, but the math of it never (or rarely does).