I think 4chan is trolling.

[shortylickens]

What other imaginary numbers are there besides i?

 

[satyajitmenon]

 

[busydude]

i and j are commonly used to represent imaginary numbers.

 

[Acanthus]

I am disappoint.

 

[Ichinisan]

i and j are commonly used to represent imaginary numbers.

...in the programming world, especially.

Outside of that, 'x' and 'n' are used more often.

 

[brianmanahan]

...in the programming world, especially.

Outside of that, 'x' and 'n' are used more often.

no, not a variable, a imaginary number

sqrt(-1)

 

[busydude]

^^ Hmm.. I never used 'x' and 'n' any where... All my teachers/ professors always use either 'i' or 'j'.

 

[MovingTarget]

Quaternions FTMFW!

/prepares to dodge incoming projectile fruits...

 

[Ichinisan]

^^ Hmm.. I never used 'x' and 'n' any where... All my teachers/ professors always use either 'i' or 'j'.

Strange. They didn't when I was in school.

The reason "i" was common in programming was because it also revealed the data type of the variable as an "integer" (in the computer programming sense, an integer occupies a fixed amt of memory and has a maximum value). When a secondary loop control variable was needed, j was the next choice...

 

[BTRY B 529th FA BN]

whoflungpoo

 

[shortylickens]

What is j?
Square root of negative e or something?

 

[brianmanahan]

What is j?
Square root of negative e or something?

in circuits math, j is used for imaginary so you don't confuse it with the current variable (ie, v = i * r)

 

[BTRY B 529th FA BN]

the leg-bone is connected to the foot-bone :whiste:

 

[shortylickens]

in circuits math, j is used for imaginary so you don't confuse it with the current variable (ie, v = i * r)

In all the years I studied and worked on electronics I never used imaginary numbers when looking at circuits.
What the hell do you need it for?

 

[bignateyk]

Strange. They didn't when I was in school.

The reason "i" was common in programming was because it also revealed the data type of the variable as an "integer" (in the computer programming sense, an integer occupies a fixed amt of memory and has a maximum value). When a secondary loop control variable was needed, j was the next choice...

I don't think you understand what an imaginary number is. An imaginary number is the square root of negative 1.

What you are describing is a variable.

 

[bignateyk]

In all the years I studied and worked on electronics I never used imaginary numbers when looking at circuits.
What the hell do you need it for?

Differential Equations for looking at circuit transients on RLC circuits? Used for impedance calculations heavily. X= -1/jwC X=jwL (from memory.. haven't looked at these in years so I could be wrong).

edit: Also used in control systems.

 

[brianmanahan]

In all the years I studied and worked on electronics I never used imaginary numbers when looking at circuits.
What the hell do you need it for?

reactance in ac: http://en.wikipedia.org/wiki/Electrical_reactance

if your doing dc, its not necessary, i think because you dont have the reactance lag

 

[YetioDoom]

eleventy

 

[BoomerD]

WTF? Imaginary numbers? I have enough trouble with "real numbers."

 

[ElFenix]

4chan? troll? never.

 

[Inspector Jihad]

I don't think you understand what an imaginary number is. An imaginary number is the square root of a negative real number.

What you are describing is a variable.

fixed

 

[busydude]

Lol no.. Imaginary number is square root of negative 1

 

[Paul98]

Sqrt(-2)

 

[busydude]

-2 can be spilt into -1 and 2.. Sqrt of -1 = i and sqrt of 2.. Is well ... You know that..

 

[polarmystery]

In all the years I studied and worked on electronics I never used imaginary numbers when looking at circuits.
What the hell do you need it for?

I find that hard to believe, since most of the principles of magnetism almost directly correlate to electronic operation.