What is the angle that the given vector makes with y-axis and A=2i+3j ?

Related Mcqs:

1. Two vectors A and B are making angle θ with each other. The scalar projection of vector B on vector A is written as____________?

   A. A.B/A
   B. A.B/B
   C. A.cosθ
   D. Both a and b are correct

2. The vector A= 2i^+2j^ makes_______ angle with x-axis.?

   A. 30°
   B. 45°
   C. 60°
   D. 90°

   Submitted by: Zahid Jagirani

3. If a vector Ā is making an angle “∅” with positive y-axis then which of the following is correct.?

   A. Ax= ACos∅
   B. Ay= ASin∅
   C. Ay= ACos∅
   D. None

   Submitted by: Zahid Jagirani

4. The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is_______________?

   A. 2i^ – 2j^ + k^
   B. (2i^ – 2j^ +k^)/9
   C. (2i^ – 2j^ +k^)/3
   D. (2i^ – 2j^ +k^)/5

5. Null vector is a vector which has________________?

   A. Zero magnitude
   B. No specified direction
   C. Both A and B are correct
   D. Both A and B are not correct

6. Angle between the rectangular components of a vector is________?

   A. Zero
   B. 30°
   C. 45°
   D. 90°

   Submitted by: Zahid Jagirani

7. The direction of the vector product is given by______________?

   A. Head to tail rule
   B. Right-hand rule
   C. Left-hand rule
   D. Triangular rule

8. The direction of a vector in space is specified by_______________?

   A. One angle
   B. Two angle
   C. Three angle
   D. No angle

9. A vector can be multiplied by a number. The number may be_______________?

   A. Dimensionless
   B. Dimensional scalar
   C. Negative
   D. All A, B and C are correct

10. Which one is a unit vector ?

    A. ??3 i^ + ??3 j^ + ??3 k^
    B. 1/??3 i^ + 1/??3 j^ +1/ ??3 k^
    C. ??3 / 3 i^ + ??3 / 3 j^ + ??3 / 3 k^
    D. Both B and C are correct