2006-06-14 18:24:23 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
EMF = electromotive force = potential = voltage = E
I = current (I know, but why the letter I?)
R = Resistance Ω = Ohms
W = Watts = Power
2006-06-14 18:35:51 · update #1
But why the letter I?
But why the letter I?
That is the question!
2006-06-14 18:36:49 · update #2
Why not A?
Who picked I out of their a**?
2006-06-14 18:39:47 · update #3
C is for Coulomb
c is for the speed of light
(or the number of particles)
2006-06-14 19:22:14 · update #4
I was selected because current was originally called "electrical intensity". "C" is used for capacitance.
2006-06-15 08:53:15 · answer #1 · answered by Űbergeek 5 · 3⤊ 0⤋
It's probably the first initial for a Latin word related to electric current. I can't remember it right now. For example: the E used for voltage is the initial for Electromotive force. Ohm's Law is just about the most handy set of equations I ever used.
2006-06-14 19:56:28 · answer #2 · answered by Anonymous · 0⤊ 0⤋
I think this is a trick question. We don't use I to represent Ohm's law, because Ohm's law is actually E is directly proportional to J where E is the electric field and J the current density.
V=IR just happens to be an equation that most follow because solving through normally leads to this equation anyway.
Anyway, I is a generally agreed upon letter for current. C is normally reserved for Velocity (most of the time of light).
2006-06-14 18:36:23 · answer #3 · answered by always under siege 5 · 0⤊ 0⤋
Hello
what letter do you want to use to represent the current?
letter C : It represent another things as
the capacity of a capacitor
the capacity of a communication channel
......
all the english letters and also the latin letters are used as symboles but realy the current in maxwell equations is represented as a "J" the current density (amper/m^2) the I=J.dS
as "J" here is a vector quantity and also the "dS" so i think they find that the letter "I" is neer to the letter "J" so the represent the current with "I"
BYE
Eng\Ayman
2006-06-15 00:25:37 · answer #4 · answered by ayman_eng2006 1 · 0⤊ 0⤋
The value of current I passing through the conductor is directly proportional to the potential difference V applied across its ends , provided the temperature and the physical state of the conductor does not change
V=IR
We use I because it is taken as standard to represent Current.
We have made some standard quantities and how they are represented .that is why I is used to represent current , as it is accepted world wide .
2006-06-14 18:33:52 · answer #5 · answered by Sidra T 3 · 0⤊ 0⤋
Current is measured in amperes or amps for short. We use the symbol "I" in the formula to represent current. (The reason for using "I" rather than "C", is that "C" is already used for something else.) The kinds of current flowing in our nerves and muscles is only a few microamps: the currents flowing in the mains might be as much as 13 amps. The currents flowing in my antenna could be very much higher! Please don't touch my antenna whilst I am transmitting.
2006-06-14 19:18:30 · answer #6 · answered by Anonymous · 0⤊ 0⤋
I = current = E (voltage) / R (resistance)
2006-06-14 18:30:08 · answer #7 · answered by dimebank 2 · 0⤊ 0⤋
it is expressed as I = V/R, V = IR, or R = V/I. they are all purely algebraic equivalents, and each style can assist you in step with what the unknown fee is which you particularly choose to locate.
2016-12-08 20:57:26 · answer #8 · answered by ? 4 · 0⤊ 0⤋
a is already used for ampere
2006-06-15 20:01:05 · answer #9 · answered by ronald m 2 · 0⤊ 0⤋
great question, kudos to you good human us's
2006-06-14 19:00:49 · answer #10 · answered by fordprefect23 1 · 0⤊ 0⤋