The term "amplitude" typically refers to the magnitude or size of a quantity. However, in the case of complex numbers, the term "amplitude" is often used interchangeably with "modulus" or "absolute value."
To find the modulus or absolute value of a complex number, you calculate the distance of the number from the origin (0, 0) in the complex plane. The modulus of a complex number is always a non-negative real number.
In the case of the complex number 2i, where "i" represents the imaginary unit (√(-1)), the amplitude or modulus can be calculated as follows:
|2i| = sqrt((0)^2 + (2)^2) = sqrt(4) = 2
Therefore, the amplitude or modulus of 2i is 2.