Complex Numbers · Mathematics · KCET
MCQ (Single Correct Answer)
1
$\sum\limits_{n=1}^{4} (-1)^{2n} \cdot i^{2n} = $
KCET 2026
2
If $Z_1$ and $Z_2$ are two non-zero complex numbers, then which of the following is not true?
KCET 2025
3
The real value of ' $\alpha$ ' for which $\frac{1-i \sin \alpha}{1+2 i \sin \alpha}$ is purely real is
KCET 2024
4
The modulus of the complex number $$\frac{(1+i)^2(1+3 i)}{(2-6 i)(2-2 i)}$$ is
KCET 2023
5
If $$3 x+i(4 x-y)=6-i$$ where $$x$$ and $$y$$ are real numbers, then the values of $$x$$ and $$y$$ are respectively,
KCET 2022
6
If $$\left(\frac{1+i}{1-i}\right)^x=1$$, then
KCET 2021
7
If $$z=x+i y$$, then the equation $$|z+1|=|z-1|$$ represents
KCET 2020
8
If $\left(\frac{1-i}{1+i}\right)^{96}=a+i b$, then $(a, b)$ is
KCET 2018
9
If $\left(\frac{1+i}{1-i}\right)^m=1$, then the least positive integral value of $m$ is
KCET 2017