📖 11th Physics Top 20 Two Mark Questions – Most Repeated (2025)

📚 Ace Your Public Exam with the Top 20 Repeated 2-Mark Questions!
This 11th Physics Top 20 Two Mark Questions Guide is designed to help Tamil Nadu 11th Public Exam 2025 students prepare effectively. It contains chapter-wise, most frequently asked 2-mark questions, compiled from previous year public exams, model tests, and textbook exercises. These frequently repeated questions are vital for scoring high marks in the 2-mark section.

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11th Physics top 20 Repeated Two Marks

  1. Define One Newton – 5 times
  2. What are the limitations of dimensional analysis? – 4 times
  3. Why is there no lunar eclipse and solar eclipse every month? – 3 times
  4. Calculate the height of the tree from a point with 60° elevation and 50m distance – 3 times
  5. Calculate the efficiency of a heat engine with given values – 3 times
  6. Define displacement and distance – 3 times
  7. What are the factors affecting the surface tension of a liquid? – 3 times
  8. What is the coefficient of restitution? – 3 times
  9. State Newton’s Universal Law of Gravitation – 3 times
  10. Define Power – 3 times
  11. Define Terminal Velocity – 2 times
  12. State Stefan-Boltzmann Law – 2 times
  13. How to prove Earth is spinning? – 2 times
  14. What is meant by escape speed? – 2 times
  15. Write a short note on scalar and vector – 2 times
  16. State Hooke’s Law – 2 times
  17. Define Wien’s Law – 2 times
  18. State Lami’s theorem – 2 times
  19. State Zeroth Law of Thermodynamics. – 2 times
  20. Two vectors addition/subtraction problem. – 2 times
  21. What is Reynolds’ number? – 2 times
  22. State the law of equipartition of energy. – 2 times
  23. What is a dimensional constant? – 2 times
  24. What are the uses of dimensional analysis? – 2 times
  25. Define Centre of Mass? – 2 times

Other Important Two Questions : ( To Score 90+) Must

  1. What are the significant features of the SI system?
  2. Define one Steradian.
  3. A RADAR signal speed calculation problem.
  4. What is meant by projectile? Give an example.
  5. How to reduce friction?
  6. Explain precision and accuracy.
  7. Write down the kinematic equations for angular motion.
  8. What is the condition for pure rolling?
  9. State the empirical laws of static and kinetic friction.
  10. How do you deduce that two vectors are perpendicular?
  11. Calculate energy consumed by a 75W fan for 30 days.
  12. Relation between frequency, wavelength, and velocity of a wave.
  13. Explain the principle of homogeneity of dimensions.
  14. Explain the types of physical quantities.
  15. Calculate the stress developed in a wire.
  16. Define the coefficient of viscosity of a liquid.
  17. Define the coefficient of performance.
  18. State the law of conservation of angular momentum.
  19. Write down the factors affecting the velocity of sound in gases.
  20. Why is there no hydrogen in the Earth’s atmosphere?
  21. Calculate the percentage increase in the time period of a pendulum.
  22. Why does the Moon have no atmosphere?
  23. Define the frequency of simple harmonic motion.
  24. Explain why angular momentum is conserved.
  25. Difference between velocity and average velocity.
  26. State the principle of moments.
  27. Compare transverse and longitudinal waves.
  28. COP calculation for a refrigerator problem.
  29. Distinguish between fundamental and defined quantity.
  30. Write the equations of motion for a particle falling vertically.
  31. Suggest methods to reduce friction.
  32. What is an elastic collision?
  33. Define torque and mention its unit.
  34. Define gravitational potential.
  35. Define forced oscillation.
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