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Author Topic: Ohm's Law  (Read 15829 times)
K1CJS
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« Reply #15 on: May 11, 2013, 07:56:49 PM »

Didn't know Ohm practiced Law. Smiley
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W1JKA
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« Reply #16 on: May 12, 2013, 05:40:20 AM »

Re:K1CJS

Of course he did and a very Calculating lawyer at that,so much so that he was appointed a Circuit Judge.
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K1CJS
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« Reply #17 on: May 12, 2013, 07:43:26 AM »

 Grin
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KD0REQ
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« Reply #18 on: May 12, 2013, 07:01:31 PM »

E = IR

E = MC²

Therefore, IR = MC².   Grin

must be why my projects have too high a blown-the-hay-up ratio.
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AC4RD
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« Reply #19 on: May 13, 2013, 04:15:27 AM »

Having E change to V is a vowel movement.
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W1JKA
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« Reply #20 on: May 13, 2013, 08:24:11 AM »

Re:AC4RD

Eeeeww that stinks  Grin
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AA4PB
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« Reply #21 on: May 13, 2013, 08:49:48 AM »

..... like the idiot that managed to get cycles changed to hertz. 

Actually the change was from "cycles per second" to "Hertz", which made more sense than "E" to "V". It was also done to honor Mr. Hertz.
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K8AXW
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« Reply #22 on: May 13, 2013, 09:12:52 AM »

I've often wondered why they couldn't have picked some other way to "honor Mr. Hertz" instead of such a disruptive.....no.... stupid.....no... the correct word doesn't come to me now.

Everyone knows what a "cycle" is.  What the hell is a hertz?   Roll Eyes
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AC4RD
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« Reply #23 on: May 13, 2013, 09:16:06 AM »

Everyone knows what a "cycle" is.  What the hell is a hertz?   Roll Eyes

It's the same thing as a henway.   Wink

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K0OD
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« Reply #24 on: May 13, 2013, 09:46:10 AM »

Cycles (or, yes, cycles per second), makes sense to English speakers that utterly dominated the literature back then. My ee son is amused when I often refer to kilocycles and megacycles. But "hertz" is as good as cycles for most of the world nowadays.

It's too late I know, but I prefer that they should have used "hertz" as a the unit for voltage. As in, "Damn that HV hertz!"

We'd probably have fewer electrocutions if signs read: "Danger High Hertz!"
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AA4PB
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« Reply #25 on: May 13, 2013, 10:08:58 AM »

Everyone knows what a "cycle" is.  What the hell is a hertz?   Roll Eyes

That's exactly the problem. People used "cycle" as though it was a measure of frequency. In fact, it is not and never has been. The measure of frequency was "cycles per second". The change to Hertz (meaning cycles per second) was a way to counter that. Yes, it took some getting used to  Wink

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W0DV
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« Reply #26 on: May 13, 2013, 05:34:31 PM »

I teach Ohm's Law as E=IR and that is what is on my Ohm's Law "T" Shirt so, no reason to change in my humble opinion. 

"Change" - didn't some politician try to foist that on the American People?  How's that working out?

A "T" shirt eh? I want one of those. Thats the way I learned ohm's law also, back in 1982 when I was in electronics school. E= Potential Difference,  I= Electron Flow, R=Resistance, P=Power. 1st day of school, pretty basic stuff.
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WB6DGN
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« Reply #27 on: May 17, 2013, 12:10:15 AM »

Quote
E= Potential Difference

The 'E' stands for 'Electromotive Force" which also got bas******** to "voltage" and, then, of course, someone attempted to change the 'E' to a 'V'.
If somebody thinks they need to honor all these guys, BUY 'EM A BEER, next time you see 'em in the bar, but leave the self-explanatory symbols and terms alone!
Tom
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W0DV
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« Reply #28 on: May 18, 2013, 02:35:09 PM »

Quote
E= Potential Difference

The 'E' stands for 'Electromotive Force" which also got bas******** to "voltage" and, then, of course, someone attempted to change the 'E' to a 'V'.
If somebody thinks they need to honor all these guys, BUY 'EM A BEER, next time you see 'em in the bar, but leave the self-explanatory symbols and terms alone!
Tom

I'm sure you are correct. However, when I went to college in the early 80's, voltage was described to us as "potential difference", and that terminology was used frequently with Ohms Law, and in physics class. Current flow cannot take place unless there is a path for electron flow from one "potential" to another. The vernacular, and terminology used in Physics stuck with me.
« Last Edit: May 18, 2013, 02:50:18 PM by W0DV » Logged
KA4NMA
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Posts: 348




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« Reply #29 on: May 18, 2013, 05:24:46 PM »

I learned ohms law by Lake Eire -  E=IR=E; Lake Eire.
I know this is a misspelling, but it helped me over 30 years ago.

The resister color code was taught to me by my brother - Big Boys rape our girls, but Violet gives willing.   Yeah I know it is bad....

Randy ka4ma
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