# Complex Numbers MCQS With Solution | Solve Complex Numbers MCQS

## Complex Numbers MCQS With Solution | Solve Complex Numbers MCQS

### Bold Options are rights answers of the following complex numbers Mcqs.

Also Read 400+ Mcqs Of Physics

1. If z is any complex number, then z − z̅ equals:

A. 2 Im(z)

B. -2 Im(z)

C. 2 Im(z)i

D. **-2 Im(z)i**

2. Complex numbers with 0 as real part are called:

A. imaginary numbers

B. pure non real numbers

C. **pure imaginary numbers**

D. pure complex numbers

3. The argument of which of the following number is not defined?

A. **0**

B. 1

C. 1/0

D. i

4. If θ is the principal argument Arg(z) of a complex number z, then:

A. 0 ≤ θ ≤ 2π

B. −π ≤ θ ≤ π

C. −π ≤ θ < π

D. **−π < θ ≤ π**

5. For k ∈ Z, the relationship between arg(z) and Arg(z) is:

A. arg(z)= Arg(z)+2kπ

B. Arg(z)= arg(z)+2kπ

C. arg(z)= Arg(z)−2kπ

D. **All of these**

6. Which of the following is unique?

A. **Arg(z)**

B. arg(z)

C. Both A and B

D. None of these

7. We can write r(cos θ + isin θ) as:

A. rsicθ

B. rcsiθ

C. **rcisθ**

D. r cos θ

8. The value of arg(5) is:

A. 0◦

B. **90◦**

C. 180◦

D. 270◦

9. The value of arg(−5) is:

A. 0◦

B. 90◦

C. 180◦

D. **270◦**

10.

The value of arg(5i) is:

A. 0◦

B. 90◦

C. 180◦

D. 270◦