i

- A mathematical unit
__equal__to the square root of -1. That is,*t*^{2}= -1. It is used in complex numbers. In electronics, the symbol utilized to express the square root of -1 is usually.*j* - (written asSymbol for
*I*)__electric current__, or current. - chemical symbol for iodine (written as
*I*) - symbol for input (written as
*I*)

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