Which of the following is a vector? MCQ with Answer and Explanation

Which of the following is a vector?
A. Speed
B. Energy
C. Distance
D. Displacement
Answer: Option D
Solution (By JKSSB Mock Tests)
Displacement has both magnitude and direction, vector. Distance is scalar (path length). Speed scalar. Energy scalar. Vector examples: velocity, force, acceleration.

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Practice More Physics Questions

Question #1
The gravitational constant G was first measured by
A. Galileo
B. Cavendish
C. Kepler
D. Newton

Correct Answer: Option B


Explanation:
Henry Cavendish used torsion balance to determine G.

This question belongs to: Science Physics
Question #2
In a simple pendulum, the restoring force is provided by
A. Centripetal force
B. Air resistance
C. Tension in string
D. Component of weight tangential to path

Correct Answer: Option D


Explanation:
For small angular displacement, restoring force = -mg sinθ ≈ -mgθ, directed towards equilibrium. Tangential component of weight. Tension balances radial component. This causes SHM.

This question belongs to: Science Physics
Question #3
A 100 W, 200 V bulb is connected to a 100 V supply. Power consumed is
A. 100 W
B. 200 W
C. 50 W
D. 25 W

Correct Answer: Option D


Explanation:
R = V²/P = 40000/100 = 400 Ω. At 100 V, P = V²/R = 10000/400 = 25 W.

This question belongs to: Science Physics