Physical World - Class 11 MCQ Test Physical World - Class 11 MCQ Test 1. Who is considered the father of modern physics? A) Albert Einstein B) Isaac Newton C) Galileo Galilei D) Niels Bohr 2. Which of the following is not a branch of physics? A) Astrophysics B) Thermodynamics C) Sociology D) Quantum Mechanics 3. The unit of energy in the SI system is: A) Joule B) Watt C) Newton D) Pascal 4. What does the theory of relativity deal with? A) Objects moving at high speeds B) Electricity and magnetism C) Quantum mechanics D) Fluid dynamics 5. The branch of physics that deals with the study of motion is called: A) Mechanics B) Optics C) Thermodynamics D) Electromagnetism 6. The speed of light is approximately: A) 3 × 10^8 m/s B) 3 × 10^6 m/s C) 1 × 10^8 m/s D) 5 × 10^8 m/s 7. What does a photon represent? A) A particle of light B) An atom of light C) A type of force D) A wave 8. The laws of motion were formulated by: A) Isaac Newton B) Albert Einstein C) Maxwell D) Faraday 9. Which of the following is the correct unit of force? A) Newton B) Joule C) Watt D) Pascal 10. What is the universal law of gravitation used to describe? A) The force between two masses B) The speed of light C) Electromagnetic fields D) The energy of atoms 11. What does the term "quantum" refer to in quantum mechanics? A) A discrete quantity of energy B) The speed of light C) The force between particles D) The shape of atoms 12. What is the primary concern of modern physics? A) Understanding the fundamental particles and forces B) Understanding the laws of motion C) Understanding the speed of light D) Understanding sound waves 13. The speed of light is the same in all reference frames, according to: A) Einstein’s theory of relativity B) Newton’s laws C) Maxwell’s equations D) Kepler’s laws 14. What is the SI unit of temperature? A) Kelvin B) Celsius C) Fahrenheit D) Rankine 15. What is the fundamental constant in the theory of relativity? A) Speed of light B) Gravitational constant C) Mass of an electron D) Planck’s constant 16. The term "black hole" refers to: A) An object with immense gravitational pull B) A region where light cannot escape C) An empty space in the universe D) A planet with no atmosphere 17. The conservation of energy principle applies to: A) All types of energy transformations B) Mechanical energy only C) Electrical energy only D) Nuclear energy only 18. What is the function of the Higgs boson particle? A) It gives particles mass B) It carries electromagnetic force C) It determines the speed of light D) It is a form of dark matter 19. The Big Bang theory explains: A) The origin of the universe B) The formation of galaxies C) The evolution of stars D) The law of gravity 20. What is the primary aim of astrophysics? A) Study of celestial bodies and phenomena B) Study of energy transformations C) Study of the Earth's atmosphere D) Study of atomic particles Submit
