SCALARS AND VECTORS MCQs 14 min Score: 0 Attempted: 0/14 Subscribe 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
