Complex Numbers and Quadratic Equations MCQ Questions for Class 11 Math’s Chapter 5 with Answers

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MCQ Questions for Class 11 Mathematics Chapter wise with Answers

Q1. The curve represented by Im(z²) = k, where k is a non-zero real number, is

(i) a pair of striaght line
(ii) an ellipse
(iii) a parabola
(iv) a hyperbola

(iv) a hyperbola

Q2. The value of √(-25) + 3√(-4) + 2√(-9) is

(i) 13 i
(ii) -13 i
(iii) 17 i
(iv) -17 i

(iii) 17 i

Q3. The modulus of 1 + i√3 is

(i) 1
(ii) 2
(iii) 3
(iv) None of these

(ii) 2

Q4. The value of √(-144) is

(i) 12i
(ii) -12i
(iii) ±12i
(iv) None of these

(i) 12i

Q5. If | z + 4 | £ 3, then the maximum value of
| z + 1 | is

(i) 6
(ii) 0
(iii) 4
(iv) 10

(i) 6

Q6. The modulus of √2i – – √2i is:

(i) 2
(ii) √2
(iii) 0
(iv) 2√2

(i) 2

Q7. Let z be a complex number such that |z| = 4 and arg(z) = 5π/6, then z =

(i) -2√3 + 2i
(ii) 2√3 + 2i
(iii) 2√3 – 2i
(iv) -√3 + i

(i) -2√3 + 2i

Q8. In z=4+i, what is the real part?

(i) 4
(ii) i
(iii) 1
(iv) 4+i

(i) 4

Q9. The real part of the complex number √9 + √(-16) is

(i) 3
(ii) -3
(iii) 4
(iv) -4

(i) 3

Q10. If the cube roots of unity are 1, ω and ω², then the value of (1 + ω / ω²)³ is

(i) 1
(ii) -1
(iii) ω
(iv) ω²

(ii) -1

Q11. If (x + iy) (2 – 3i) = 4 + i, then

(i) x = – 14/13, y = 5/13
(ii) x = 5/13, y = 14/13
(iii) x = 14/13, y = 5/13
(iv) x = 5/13, y = – 14/13

(ii) x = 5/13, y = 14/13

Q12. The value of √(-25) + 3√(-4) + 2√(-9) is

(i) 13i
(ii) -13i
(iii) 17i
(iv) -17i

(iii) 17i

Q13. The least value of n for which {(1 + i)/(1 – i)}ⁿ is real, is

(i) 1
(ii) 2
(iii) 3
(iv) 4

(ii) 2

Q14. 1 + i2 + i4 + i6 + … + i2n is

(i) positive
(ii) negative
(iii) 0
(iv) cannot be determined

(iv) cannot be determined

Q15. Find real θ such that (3 + 2i × sin θ)/(1 – 2i × sin θ) is real

(i) π
(ii) nπ
(iii) nπ/2
(iv) 2nπ

(ii) nπ

We hope the given NCERT MCQ Questions for Class 11 Mathematics book Chapter 5 Complex Numbers and Quadratic Equations with Answers PDF Free Download solution will definitely help you to achieve perfect score. If you have any queries related to CBSE Class 11 Mathematics book Chapter 5 Complex Numbers and Quadratic Equations with Answers book MCQs Multiple Choice Questions with Answers, drop your questions below and will get back to you in no time.

MCQ Questions for Class 11 Mathematics Chapter wise with Answers

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