Physics – Multiple Choice Questions (MCQs)

1. 1. What is the SI unit of force?

   • A. Newton
   • B. Joule
   • C. Watt
   • D. Pascal

2. 2. What is the SI unit of energy?

   • A. Newton
   • B. Joule
   • C. Watt
   • D. Pascal

3. 3. What is the SI unit of power?

   • A. Newton
   • B. Joule
   • C. Watt
   • D. Pascal

4. 4. What is the SI unit of pressure?

   • A. Newton
   • B. Joule
   • C. Watt
   • D. Pascal

5. 5. What is the speed of light in a vacuum?

   • A. 3 x 10^8 m/s
   • B. 3 x 10^5 km/s
   • C. 3 x 10^10 cm/s
   • D. 3 x 10^6 m/s

6. 6. Which law states that the force between two point charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between their centers?

   • A. Newton's Law of Gravitation
   • B. Coulomb's Law
   • C. Ohm's Law
   • D. Faraday's Law

7. 7. What is Ohm's Law?

   • A. V = IR
   • B. E = mc^2
   • C. F = ma
   • D. PV = nRT

8. 8. What is Newton's first law of motion?

   • A. Every action has an equal and opposite reaction
   • B. An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force
   • C. Force equals mass times acceleration
   • D. Energy cannot be created or destroyed

9. 9. What is Newton's second law of motion?

   • A. Every action has an equal and opposite reaction
   • B. An object at rest stays at rest
   • C. Force equals mass times acceleration
   • D. Energy is conserved

10. 10. What is Newton's third law of motion?

    • A. Every action has an equal and opposite reaction
    • B. An object in motion stays in motion
    • C. Force is inversely proportional to mass
    • D. Energy can be transformed

11. 11. What is gravity?

    • A. The force that attracts any two objects with mass
    • B. The force that repels objects with the same charge
    • C. The force that holds atoms together
    • D. The force responsible for nuclear reactions

12. 12. What is the acceleration due to gravity on the Earth's surface (approximately)?

    • A. 9.8 m/s^2
    • B. 100 m/s^2
    • C. 1.62 m/s^2
    • D. 0 m/s^2