E=IxR

[rattus]

Re: E=IxR

Yer right Charlie B. And your prize is 3.6E6 joules if you can catch them.

 

[lesliek]

Re: E=IxR

To answer the ORIGINAL question that was posed, "what does the I stand for"...

The "I" in Ohms Law is derived from the German word "Intensitat" (the "a" in this word has a double oomlaut) which means INTENSITY. Which is typically used for the Amount of current (the amount of charge Q flowing per unit of time t)
i(t) = [dq(t)]/[dt]

So..tell your daughter and her teacher same. Ohm's work was originally published in "bavarian" that's "German" to the modernist.

Now you all know and/or remember...right?

 

[templdl]

Re: E=IxR

My 2 cents worth re. the symbol'I':
"The symbol typically used for the amount of current (the amount of charge Q flowing per unit of time t) is I, from the German word Intensit?t, which means 'intensity'."
The symbol for the charge on an object is Q (or q), and the unit of charge is the coulomb, (C).
And,a coulomb?: the quantity of electricity involved when a current of one ampere flows for one second.
One coulomb=6.3x1018 electrons (elementary charges).
Dave T

 

[Paul B]

Re: E=IxR

100,000 electrons = 1 columb
1 columb per second = 1 ampere
100,000 electrons per second = 1 ampere

Don't get your units mixed up when changing subjects

 

[rattus]

Re: E=IxR

Sorry, but no cigar for either of you.

The charge on one electron is,

-1.6E-19 Coulomb,

therefore,

1 Coulomb is the charge on,

6.25E18 electrons.

Powers of ten may be represented as follows,

E18, 10^18, or 10**18 all mean 10 to the eighteenth power.

 

[templdl]

Re: E=IxR

I got "zapped" on that one.
But, who cares. Just get the ol' Fluke out and have at it.

 

[rattus]

Re: E=IxR

Dave,

That is what I thought you meant!

Rattus

 

[physis]

Re: E=IxR

By lesliek:

To answer the ORIGINAL question that was posed, "what does the I stand for"...

The "I" in Ohms Law is derived from the German word "Intensitat" (the "a" in this word has a double oomlaut) which means INTENSITY. Which is typically used for the Amount of current (the amount of charge Q flowing per unit of time t)
i(t) = [dq(t)]/[dt]

So..tell your daughter and her teacher same. Ohm's work was originally published in "bavarian" that's "German" to the modernist.

Now you all know and/or remember...right?

I've looked around quite a bit trying to find where I originates from and haven't been able to find anything. As far as I can tell Ampere was using I during his experiments. I'm not sure about this but I think it was before Ohm's law.

Can you provide a reference or a link?