Physics Conceptual MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 20, 2025

1. What happens to the velocity of an object in free fall (neglecting air resistance) as it approaches the ground?
(A) Increases
(B) Decreases
(C) Remains constant
(D) Oscillates

2. Which quantity is a vector?
(A) Speed
(B) Distance
(C) Displacement
(D) Time

3. When a force acts on an object but it does not move, what type of work is done?
(A) Positive work
(B) Negative work
(C) Zero work
(D) Variable work

4. If the net force on an object is zero, which of the following is true?
(A) Object must be at rest
(B) Object must be moving with constant velocity
(C) Object must be accelerating
(D) Object is moving in circular motion

5. Which of the following is conserved in an isolated system with no external forces?
(A) Energy only
(B) Momentum only
(C) Both energy and momentum
(D) Neither energy nor momentum

6. Which phenomenon explains why the sky appears blue?
(A) Reflection
(B) Refraction
(C) Scattering of light
(D) Diffraction

7. When light passes from air into water, what happens to its speed?
(A) Increases
(B) Decreases
(C) Remains the same
(D) Becomes zero

8. Which of the following is NOT a form of energy?
(A) Kinetic energy
(B) Potential energy
(C) Temperature
(D) Thermal energy

9. What is the cause of centripetal force in a satellite orbiting the Earth?
(A) Gravitational force
(B) Frictional force
(C) Magnetic force
(D) Electrostatic force

10. A body moving in a circle at constant speed has:
(A) Zero acceleration
(B) Constant velocity
(C) Constant speed but changing velocity
(D) Zero velocity