Physics MCQs with Answers
- Best For students
- 1 Hrs
Strengthen your preparation with important and challenging Physics MCQs designed for scholarship exams, competitive tests, and job interviews. These questions cover classical mechanics, thermodynamics, electricity, magnetism, optics, modern physics, and more — helping you build a solid understanding of key Physics concepts.
Q1. Which of the following is a scalar quantity?
(A) Velocity
(B) Force
(C) Mass
(D) Acceleration
Answer: (C) Mass
Q2. The unit of electric charge is:
(A) Watt
(B) Coulomb
(C) Joule
(D) Newton
Answer: (B) Coulomb
Q3. Acceleration due to gravity on the surface of Earth is approximately:
(A) 8.9 m/s²
(B) 9.8 m/s²
(C) 10.8 m/s²
(D) 11.8 m/s²
Answer: (B) 9.8 m/s²
Q4. The speed of light in vacuum is approximately:
(A) 2.5 × 10⁸ m/s
(B) 3 × 10⁸ m/s
(C) 1.5 × 10⁸ m/s
(D) 4 × 10⁸ m/s
Answer: (B) 3 × 10⁸ m/s
Q5. Which of the following has the shortest wavelength?
(A) Radio waves
(B) X-rays
(C) Gamma rays
(D) Infrared rays
Answer: (C) Gamma rays
Q6. Ohm’s law states that:
(A) V = IR
(B) P = VI
(C) W = FS
(D) Q = It
Answer: (A) V = IR
Q7. Which of the following particles has no charge?
(A) Proton
(B) Electron
(C) Neutron
(D) Positron
Answer: (C) Neutron
Q8. The first law of thermodynamics is a restatement of:
(A) Conservation of mass
(B) Conservation of momentum
(C) Conservation of energy
(D) Conservation of force
Answer: (C) Conservation of energy
Q9. The S.I unit of frequency is:
(A) Newton
(B) Watt
(C) Hertz
(D) Joule
Answer: (C) Hertz
Q10. The center of mass of a freely falling body moves with:
(A) Uniform acceleration
(B) Uniform velocity
(C) Zero acceleration
(D) Decreasing velocity
Answer: (A) Uniform acceleration
Q11. Which law explains why we wear seat belts in cars?
(A) Newton’s First Law
(B) Newton’s Second Law
(C) Newton’s Third Law
(D) Law of Gravitation
Answer: (A) Newton’s First Law
Q12. The bending of light as it passes from one medium to another is called:
(A) Reflection
(B) Refraction
(C) Diffraction
(D) Dispersion
Answer: (B) Refraction
Q13. Which type of mirror is used in vehicles as rear-view mirrors?
(A) Concave mirror
(B) Convex mirror
(C) Plane mirror
(D) Cylindrical mirror
Answer: (B) Convex mirror
Q14. Which physical quantity is measured in Tesla?
A) Electric field
(B) Magnetic flux density
(C) Pressure
(D) Energy
Answer: (B) Magnetic flux density
Q15. Which color of light has the highest frequency?
(A) Red
(B) Green
(C) Blue
(D) Violet
Answer: (D) Violet
Q16. The escape velocity from Earth is about:
(A) 5 km/s
(B) 8 km/s
(C) 11.2 km/s
(D) 15 km/s
Answer: (C) 11.2 km/s
Q17. The phenomenon of electromagnetic induction was discovered by:
(A) Newton
(B) Faraday
(C) Maxwell
(D) Coulomb
Answer: (B) Faraday
Q18. The absolute zero temperature in Kelvin is:
(A) 0 K
(B) 100 K
(C) –273 K
(D) 273 K
Answer: (A) 0 K
Q19. In nuclear fission, energy is released due to:
(A) Conversion of energy into mass
(B) Conversion of mass into energy
(C) Fusion of nuclei
(D) Splitting of electrons
Answer: (B) Conversion of mass into energy
Q20. The first man to travel into space was:
(A) Light
(B) Sound
(C) Air
(D) Water waves
Answer: (A) Light
Q21. The SI unit of work is:
(A) Watt
(B) Joule
(C) Newton
(D) Pascal
Answer: (B) Joule
Q22. Which device converts electrical energy into mechanical energy?
(A) Transformer
(B) Generator
(C) Motor
(D) Rectifier
Answer: (C) Motor
Q23. Which law governs the floating of ships?
(A) Pascal’s Law
(B) Boyle’s Law
(C) Archimedes’ Principle
(D) Bernoulli’s Principle
Answer: (C) Archimedes’ Principle
Q24. The image formed on the retina of the human eye is:
(A) Real and upright
(B) Virtual and upright
(C) Real and inverted
(D) Virtual and inverted
Answer: (C) Real and inverted
Q25. The main constituent of the Sun is:
(A) Oxygen
(B) Helium
(C) Hydrogen
(D) Carbon
Answer: (C) Hydrogen
Q26. The time period of a simple pendulum depends on:
(A) Mass of the bob
(B) Length of the pendulum
(C) Amplitude of swing
(D) Air pressure
Answer: (B) Length of the pendulum
Q27. Which wave requires a medium to travel?
(A) Light wave
(B) Sound wave
(C) Radio wave
(D) X-ray
Answer: (B) Sound wave
Q28. The SI unit of power is:
(A) Joule
(B) Watt
(C) Newton
(D) Ampere
Answer: (B) Watt
Q29. The half-life of a radioactive substance is the time required for:
(A) All atoms to decay
(B) Half the atoms to decay
(C) Energy to double
(D) Mass to double
Answer: (B) Half the atoms to decay
Q30. Which device is used to measure atmospheric pressure?
(A) Thermometer
(B) Barometer
(C) Hygrometer
(D) Ammeter
Answer: (B) Barometer
Q31. The filament of an electric bulb is made of:
(A) Iron
(B) Copper
(C) Tungsten
(D) Aluminum
Answer: (C) Tungsten
Q32. Who proposed the special theory of relativity?
(A) Newton
(B) Einstein
(C) Galileo
(D) Bohr
Answer: (B) Einstein
Q33. A transformer works on the principle of:
(A) Mutual induction
(B) Self-induction
(C) Conservation of momentum
(D) Conservation of mass
Answer: (A) Mutual induction
Q34. Which physical quantity is the rate of change of momentum?
(A) Force
(B) Power
(C) Work
(D) Acceleration
Answer: (A) Force
Q35. The unit of electric current is:
(A) Volt
(B) Ohm
(C) Ampere
(D) Watt
Answer: (C) Ampere
Q36. Which type of lens is used to correct short-sightedness?
(A) Convex lens
(B) Concave lens
(C) Plano-convex lens
(D) Cylindrical lens
Answer: (B) Concave lens
Q37. The angle of incidence is equal to the angle of reflection. This is the law of:
(A) Refraction
(B) Reflection
(C) Diffraction
(D) Dispersion
Answer: (B) Reflection
Q38. The device used to detect and measure radiation is:
(A) Galvanometer
(B) Geiger-Muller counter
(C) Barometer
(D) Ammeter
Answer: (B) Geiger-Muller counter
Q39. The kinetic energy of a moving body depends on:
(A) Mass and velocity
(B) Mass only
(C) Velocity only
(D) Acceleration
Answer: (A) Mass and velocity
Q40. Which of the following has the highest energy photons?
(A) Infrared rays
(B) Ultraviolet rays
(C) X-rays
(D) Gamma rays
Answer: (D) Gamma rays
Q41. Which law explains the lift of an airplane wing?
(A) Boyle’s Law
(B) Bernoulli’s Principle
(C) Archimedes’ Principle
(D) Newton’s Third Law
Answer: (B) Bernoulli’s Principle
Q42. The unit of potential difference is:
(A) Ohm
(B) Volt
(C) Joule
(D) Watt
Answer: (B) Volt
Q43. A diode is used for:
(A) Amplification
(B) Rectification
(C) Oscillation
(D) Modulation
Answer: (B) Rectification
Q44. What is the S.I. unit of pressure?
(A) Newton
(B) Joule
(C) Pascal
(D) Hertz
Answer: (C) Pascal
Q45. Which of the following is an example of a renewable energy source?
(A) Coal
(B) Oil
(C) Solar energy
(D) Natural gas
Answer: (C) Solar energy
Q46. The resistance of a conductor is inversely proportional to its:
(A) Length
(B) Cross-sectional area
(C) Temperature
(D) Material
Answer: (B) Cross-sectional area
Q47. Which type of nuclear reaction takes place in the Sun?
(A) Fission
(B) Fusion
(C) Radioactive decay
(D) Induction
Answer: (B) Fusion
Q48. The unit of capacitance is:
(A) Farad
(B) Coulomb
(C) Henry
(D) Ohm
Answer: (A) Farad
Q49. Sound cannot travel through:
(A) Solids
(B) Liquids
(C) Gases
(D) Vacuum
Answer: (D) Vacuum
Q50. The phenomenon responsible for the rainbow is:
(A) Reflection
(B) Refraction and Dispersion
(C) Diffraction
(D) Interference
Answer: (B) Refraction and Dispersion
