# Complex Numbers and Quadratic Equations MCQ Questions for Class 11 Maths Chapter 5 with Answers

We have completed the NCERT/CBSE chapter-wise Multiple Choice Questions for Class 11 Mathematics book Chapter 5 Complex Numbers and Quadratic Equations with Answers by expert subject teacher for latest syllabus and examination. You can Prepare effectively for the exam taking the help of the Class 11 Maths Objective Questions PDF free of cost from here. Students can take a free test of the Multiple Choice Questions of Complex Numbers and Quadratic Equations. Each Questions has four options followed by the right answer. Download the Maths Quiz Questions with Answers for Class 11 free Pdf and prepare to exam and help students understand the concept very well.

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

(iii) 17 i

## Q2. The value of √(-144) is

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

(i) 12i

(i) 2
(ii) √2
(iii) 0
(iv) 2√2

(i) 2

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

(i) 4

(i) 1
(ii) -1
(iii) ω
(iv) ω²

(ii) -1

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

(iii) 17i

## Q7. 1 + i2 + i4 + i6 + … + i2n is

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

(iv) cannot be determined

## Q8. (x+3) + i(y-2) = 5+i2, find the values of x and y.

(i) x=8 and y=4
(ii) x=2 and y=4
(iii) x=2 and y=0
(iv) x=8 and y=0

(ii) x=2 and y=4

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

(iv) 4

## Q10. if z lies on |z| = 1, then 2/z lies on

(i) a circle
(ii) an ellipse
(iii) a straight line
(iv) a parabola

(i) a circle

## Q11. If z = 2 – 3i, then the value of z² – 4z + 13 is

(i) 1
(ii) –1
(iii) 0
(iv) None of these

(iii) 0

(i) 1 or i
(ii) i or – i
(iii) 1 or – 1
(iv) i or – 1

(iii) 1 or –1

(i) 128 ω
(ii) -128 ω
(iii) 128 ω²
(iv) -128 ω²

(iv) -128 ω²

(i) 7
(ii) 1
(iii) c2
(iv) – c2

(ii) 1

(i) π
(ii) nπ
(iii) nπ/2
(iv) 2nπ

(ii) nπ

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

(ii) 2

## Q17. 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

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

(i) 3

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

(i) -2√3 + 2i

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

(i) 6

## Q21. The modulus of 1 + i√3 is

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

(ii) 2

## Q22. 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

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