If represents a circle, then its radius is equal to
Explanation for the correct option.
Step 1. Assume the complex number and simplify the equation.
Let be a complex number. Now the equation becomes:
Now, square both sides.
Step 2. Write the equation in standard form and find its radius.
The equation can be written in standard form as:
On comparing the equation with the standard equation of circle , it can be seen that the center of the circle is and its radius is .
So the radius of the circle is .
Hence, the correct option is D.