Physical quantities are classified into scalars and vectors based on whether direction is involved or not.
Scalar quantities are those physical quantities which have magnitude only and no direction.
Vector quantities are those physical quantities which have both magnitude and direction.
Vectors are represented by arrows. The length of the arrow represents magnitude and the arrowhead shows direction.
| Scalars | Vectors |
|---|---|
| Have magnitude only | Have magnitude and direction |
| Added algebraically | Added using vector laws |
| Example: speed | Example: velocity |
Q1. Which of the following is a scalar quantity? A) Velocity B) Force C) Displacement D) Speed Answer: D Q2. Which of the following is a vector quantity? A) Mass B) Time C) Energy D) Acceleration Answer: D Q3. Scalar quantities have: A) Only direction B) Only magnitude C) Both magnitude and direction D) No magnitude Answer: B Q4. Vector quantities have: A) Only magnitude B) Only direction C) Both magnitude and direction D) No direction Answer: C Q5. Which pair contains only scalar quantities? A) Speed, velocity B) Distance, displacement C) Mass, time D) Force, momentum Answer: C Q6. Which pair contains only vector quantities? A) Speed, velocity B) Displacement, force C) Mass, acceleration D) Energy, work Answer: B Q7. Vectors are represented by: A) Numbers B) Symbols only C) Arrows D) Points Answer: C Q8. Addition of vectors is done by: A) Simple arithmetic B) Vector laws C) Multiplication D) Division Answer: B
Have magnitude only.
Have magnitude and direction.
Vectors are represented by arrows.
Speed is scalar, velocity is vector.
Direct MCQs are asked on classification of scalars and vectors.
