Complex Numbers and Quadratic Equations

39 CBSE Class 11 Mathematics practice questions with answers and worked solutions.

Difficulty: 9 easy · 25 moderate · 5 hard.
Most-asked subtopics: Modulus and Conjugate (17), Algebra of Complex Numbers (17), Complex Numbers and the Imaginary Unit (5).
Updated 17 August 2026.

#1Complex Numbers and the Imaginary Unit
Set · 2 questions
Express the following in the form of $a + bi$ :
- #2Algebra of Complex Numbers
- #3Algebra of Complex Numbers
#4Algebra of Complex Numbers
#5Algebra of Complex Numbers
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#6Modulus and Conjugate
Set · 2 questions
Express the following in the form $a + ib$
- #7Modulus and Conjugate
- #8Complex Numbers and the Imaginary Unit
#9Algebra of Complex Numbers
#10Complex Numbers and the Imaginary Unit
#11Complex Numbers and the Imaginary Unit
#12Algebra of Complex Numbers
#13Algebra of Complex Numbers
#14Algebra of Complex Numbers
#15Algebra of Complex Numbers
#16Algebra of Complex Numbers
#17Algebra of Complex Numbers
#18Algebra of Complex Numbers
#19Modulus and Conjugate
#20Modulus and Conjugate
#21Modulus and Conjugate
#22Algebra of Complex Numbers
#23Modulus and Conjugate
#24Modulus and Conjugate
#25Complex Numbers and the Imaginary Unit
#26Algebra of Complex Numbers
#27Algebra of Complex Numbers
#28Modulus and Conjugate
#29Modulus and Conjugate
#30Modulus and Conjugate
Set · 2 questions
Let $z_{1} = 2 - i$ , $z_{2} = -2 + i$ . Find
- #31Modulus and Conjugate
- #32Modulus and Conjugate
#33Modulus and Conjugate
#34Modulus and Conjugate
#35Algebra of Complex Numbers
#36Modulus and Conjugate
#37Modulus and Conjugate
#38Modulus and Conjugate
#39Algebra of Complex Numbers

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