## Real and imaginary parts of complex numbers, Algebraic operations, Equality of two Complex numbers MCQ Basic Level

Compared to other sections, mathematics is considered to be the most scoring section. If prepared thoroughly, mathematics can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. The statement (a+ib)<(c+id) is true for

•  √a2+b2=0
•  -√b2+c2=0
•  i√a2+c2=0
•  b2+d2=0

b2+d2=0

Q2. The true statement is

•  1 – i <1 i="" li="">
•  2i + 1>–2i + 1
•  2i > 1
•  None of these

None of these

Q3. The complex number (1+2i)/(1-i) lies in which quadrant of the complex plane

•  First
•  Second
•  Third
•  Fourth

Second

Q4. If z1 and z2 be two complex numbers, then Re (z1 z2) =

•  Re (z1). Re (z2)
•  Re (z1). Im (z2)
•  Im (z1). Re (z2)
•  None of these

None of these

Q5. The multiplication inverse of a number is the number itself, then its initial value is

•  i
•  -1
•  2
•  -i

-1

Q6. If z=1+i, then the multiplicative inverse of z2 is (where i =√-1 )

•  2 i
•  1 – i
•  -i/2
•  i/2

-i/2

Q7. Additive inverse of 1 – i is

•  0 + 0 i
•  – 1 – i
•  – 1 + i
•  None of these

– 1 + i

Q8. The number of real values of a satisfying the equation a2– 2a sin x + 1 = 0 is

•  Zero
•  One
•  Two
•  Infinite

Two

Q9. Which of the following is not applicable for a complex number

•  Subtraction
•  Division
•  Inequality

Inequality

Q10. If z(2-i)=3+i, then z20 =

•  1 – i
•  – 1024
•  1024
•  1 + i

– 1024

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