Physics MCQs January 8, 2026July 12, 2024 by u930973931_answers 50 min Score: 0 Attempted: 0/50 Subscribe 1. What is the SI unit of electric current? (A) Ohm (B) Ampere (C) Volt (D) Watt 2. Which law states that the induced electromotive force (EMF) in a circuit is directly proportional to the rate of change of magnetic flux through the circuit? (A) Faraday’s Law of Electromagnetic Induction (B) Ohm’s Law (C) Gauss’s Law (D) Newton’s Law of Motion 3. What is the SI unit of power? (A) Joule (B) Watt (C) Newton (D) Volt 4. According to Newton’s first law of motion, an object at rest will remain at rest unless acted upon by a _______. (A) gravitational force (B) net force (C) magnetic force (D) frictional force 5. What type of lens is thicker in the middle than at the edges and causes light rays to converge to a single point? (A) Convex lens (B) Concave lens (C) Plano-concave lens (D) Plano-convex lens 6. What is the SI unit of capacitance? (A) Farad (B) Henry (C) Coulomb (D) Ohm 7. The acceleration due to gravity on the surface of the Earth is approximately _______. (A) 9.81 m/s² (B) 3.00 m/s² (C) 6.67 × 10⁻¹¹ Nm²/kg² (D) 1.62 m/s² 8. What is the phenomenon called when a wave changes direction as it passes from one medium to another at an angle? (A) Diffraction (B) Refraction (C) Reflection (D) Interference 9. According to Einstein’s theory of relativity, mass and energy are equivalent and can be converted into each other according to the equation _______. (A) E = mc (B) E = mc² (C) E = mv² (D) E = m²c² 10. What is the fundamental SI unit of temperature? (A) Celsius (B) Kelvin (C) Fahrenheit (D) Rankine 11. Which of these is NOT a fundamental force in nature? (A) Gravity (B) Electromagnetic force (C) Strong nuclear force (D) Centrifugal force 12. Which law states that the total electric flux through a closed surface is equal to the charge enclosed divided by the permittivity? (A) Gauss’s Law (B) Ohm’s Law (C) Faraday’s Law (D) Coulomb’s Law 13. In which type of nuclear reaction do lighter nuclei combine to form a heavier nucleus, releasing energy? (A) Nuclear fission (B) Nuclear fusion (C) Alpha decay (D) Beta decay 14. The phenomenon of persistence of vision explains why we perceive continuous motion in _______. (A) movies (B) television (C) rotating fan blades (D) all of the above 15. What is the unit of electric charge? (A) Volt (B) Ampere-hour (C) Coulomb (D) Ohm 16. Which of these is a vector quantity? (A) Speed (B) Distance (C) Displacement (D) Temperature 17. The instrument used to measure atmospheric pressure is called a _______. (A) barometer (B) hygrometer (C) altimeter (D) manometer 18. Which type of wave requires a medium to propagate? (A) Electromagnetic wave (B) Sound wave (C) X-ray (D) Gamma-ray 19. Which law states that for every action, there is an equal and opposite reaction? (A) Newton’s First Law (B) Newton’s Second Law (C) Newton’s Third Law (D) Kepler’s Third Law 20. Which of these is NOT a type of mechanical wave? (A) Longitudinal wave (B) Transverse wave (C) Electromagnetic wave (D) Surface wave 21. What is the phenomenon called when light spreads out as it passes through a narrow slit? (A) Diffraction (B) Refraction (C) Reflection (D) Interference 22. The force experienced by a current-carrying conductor in a magnetic field is known as _______. (A) Faraday’s Law (B) Lenz’s Law (C) Ohm’s Law (D) Lorentz Force 23. What is the formula for kinetic energy? (A) E = ½ mv² (B) E = mgh (C) E = mvt (D) E = Fd 24. The property of a body to remain at rest or in uniform motion in the absence of an external force is known as _______. (A) inertia (B) momentum (C) acceleration (D) equilibrium 25. Which of these devices is used to measure electric current? (A) Ammeter (B) Voltmeter (C) Galvanometer (D) Ohmmeter 26. The phenomenon of mirage is due to _______. (A) reflection (B) refraction (C) diffraction (D) interference 27. Which type of mirror always produces a virtual image? (A) Concave mirror (B) Convex mirror (C) Plane mirror (D) Spherical mirror 28. The rate of change of momentum of an object is equal to the _______ applied to it. (A) force (B) velocity (C) acceleration (D) mass 29. Which law states that the pressure of a given mass of gas is inversely proportional to its volume, provided the temperature remains constant? (A) Boyle’s Law (B) Charles’s Law (C) Gay-Lussac’s Law (D) Avogadro’s Law 30. What is the unit of magnetic field strength? (A) Tesla (B) Gauss (C) Weber (D) Ohm 31. Which of these is NOT a type of electromagnetic radiation? (A) X-ray (B) Gamma-ray (C) Ultrasound (D) Microwave 32. What is the principle behind a transformer? (A) Faraday’s Law of Induction (B) Newton’s Third Law (C) Archimedes’ Principle (D) Pascal’s Principle 33. The work done in moving a charge in an electric field from one point to another is measured in _______. (A) volts (B) ohms (C) joules (D) coulombs 34. What type of lens is thinner in the middle than at the edges and causes light rays to diverge? (A) Concave lens (B) Convex lens (C) Plano-concave lens (D) Plano-convex lens 35. Which law states that the heat gained by a system is equal to the sum of the heat lost and the work done by the system? (A) First Law of Thermodynamics (B) Second Law of Thermodynamics (C) Boyle’s Law (D) Charles’s Law 36. The acceleration due to gravity decreases with altitude because _______. (A) there is less air resistance (B) the Earth’s magnetic field weakens (C) the mass of the Earth decreases (D) the distance from the Earth’s center increases 37. What is the SI unit of frequency? (A) Hertz (B) Watt (C) Pascal (D) Newton 38. What is the energy stored in a capacitor? (A) E = ½ CV² (B) E = ½ LI² (C) E = ½ mv² (D) E = ½ kx² 39. Which of these materials has the highest conductivity? (A) Rubber (B) Glass (C) Copper (D) Wood 40. The study of motion and the forces producing motion is called _______. (A) geology (B) physics (C) chemistry (D) biology 41. What is the phenomenon called when a wave bounces back after striking a boundary? (A) Refraction (B) Diffraction (C) Reflection (D) Interference 42. According to Newton’s second law of motion, the acceleration of an object is directly proportional to the _______ applied to it. (A) mass (B) velocity (C) force (D) displacement 43. The force of attraction or repulsion between two charged objects is governed by _______. (A) Newton’s Law of Gravitation (B) Coulomb’s Law (C) Ohm’s Law (D) Hooke’s Law 44. What is the unit of electrical resistance? (A) Ohm (B) Ampere (C) Volt (D) Watt 45. Which color of light bends the most when passing through a prism? (A) Red (B) Green (C) Blue (D) All colors bend equally 46. Which scientist formulated the laws of motion? (A) Isaac Newton (B) Albert Einstein (C) Galileo Galilei (D) Johannes Kepler 47. The phenomenon of a rainbow is caused by _______. (A) reflection (B) refraction (C) diffraction (D) dispersion 48. Which law states that the volume of a given mass of gas is directly proportional to its temperature, provided the pressure remains constant? (A) Boyle’s Law (B) Charles’s Law (C) Gay-Lussac’s Law (D) Avogadro’s Law 49. What is the SI unit of work and energy? (A) Joule (B) Newton (C) Watt (D) Pascal 50. Which of these statements is true about a convex mirror? (A) It always produces a virtual image. (B) It always produces a real image. (C) It has a focal point in front of the mirror. (D) It has a focal point behind the mirror.