1st Year Mathematics Chapter 1 TestUNIT 1: Complex Numbers

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Multiplicative inverse of (1,0) is:

   1. (-1,0)

   2. (0,1)

   3. (0,-1)

   4. (1,0)

2. If 

   1. -2-3

   2. 2-3

   3. -2+3

   4. 2+3

3. If Z is complex number, then  is:

   1. Z²

   2. 

   3. 

   4. 

4. For a complex number (0,1)i = ......

   1. (1,0)

   2. (-1,0)

   3. (0,1)

   4. (0,-1)

5. If 

   1. Z₁ < Z₂

   2. Z₁ > Z₂

   3. 

   4. 

6. Argument  is:

   1. 60^o

   2. 30^o

   3. 45^o

   4. 90^o

7. For any  is equivalent to ......:

   1. 

   2. 

   3. 

   4. 

8. Polar form of complex number 

   1. 

   2. 

   3. 

   4. 

9. If  is the cube root of unity then 

   1. 256

   2. -256

   3. -256

   4. 256

10. A complex number  can also be expressed as:

    1. 

    2. 

    3. 

    4.