1. . Which of the following is a scalar quantity?
(A) Energy
(B) Velocity
(C) Force
(D) Torque
2. . Which one is the vector quantity?
(A) Density
(B) Length
(C) Force
(D) Work
3. . A vector which has magnitude one is called
(A) Null vector
(B) Position vector
(C) Unit 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) 6N
(B) Zero
(C) 12N
(D) 3N
6. . Cos 60˚ has the value:
(A) 1
(B) 0.866
(C) 0.5
(D) 0.707
7. . If a vector A makes an angle θ with x–axis, its x-component is given by
(A) A Sinθ
(B) A tanθ
(C) A Cosθ
(D) A Cotθ
8. . If two vectors make an angle of 90˚ with each other, their scalar product is:
(A) 0
(B) 1
(C) 1
(D) 2
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 Cosθ
(D) AB tanθ
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) 30˚
(C) 60˚
(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 an example of
(A) Vector
(B) Scalar
(C) Negative of a vector
(D) Null vector