1. Which of the following is a scalar quantity?
(A) Force
(B) Velocity
(C) Energy
(D) Work
2. Which one is the vector quantity?
(A) Density
(B) Length
(C) Torque
(D) Force
3. A vector which has magnitude (one) is called
(A) Null vector
(B) Unit vector
(C) Position vector
(D) Negative vector
4. The angle between two rectangular components of a vector is
(A) 30˚
(B) 60˚
(C) 90˚
(D) 180˚
5. A force of 6N is acting along x–axis. Its y–component is
(A) Zero
(B) 6N
(C) 12N
(D) 3N
6. Cos 60˚ has the value:
(A) 1
(B) 0.5
(C) 0.866
(D) 0.707
7. If a vector A makes an angle θ with x–axis, its x-component is given by
(A) A Cosθ
(B) A tanθ
(C) A Sinθ
(D) A Cotθ
8. If two vectors make an angle of 90˚ with each other, their scalar product is:
(A) 2
(B) 1
(C) 1
(D) 0
9. The scalar product of two vectors A and B at an angle θ with each other is
(A) AB
(B) AB Sinθ
(C) AB tanθ
(D) AB Cosθ
10. If vectors A and B are parallel to each other then
(A) A · B = 0
(B) A · B = 1
(C) A · B = -AB
(D) A · B = AB
11. The cross product of vector A with itself (A × A) is
(A) A
(B) 1
(C) Zero
(D) A²
12. In a right angle triangle, if one of its angles is 30˚ then the other will have value
(A) 0˚
(B) 60˚
(C) 30˚
(D) 90˚
13. Which of these statements is correct?
(A) A · B = – B · A
(B) A × B = B × A
(C) A · B ≠ B · A
(D) A · B = B · A
14. Time is example of
(A) Scalar
(B) Vector
(C) Negative of a vector
(D) Null vector