Physics MCQs

1. What is the SI unit of electric current? A) Ohm B) Ampere C) Volt D) Watt Answer: B) Ampere 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 Answer: A) Faraday’s Law of Electromagnetic Induction 3. What is the SI unit of power? A) Joule B) Watt C) Newton D) Volt Answer: B) Watt 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 Answer: B) net 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 Answer: A) Convex lens 6. What is the SI unit of capacitance? A) Farad B) Henry C) Coulomb D) Ohm Answer: A) Farad 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 Answer: A) 9.81 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 Answer: B) Refraction 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 Answer: B) E = mc² 10. What is the fundamental SI unit of temperature? A) Celsius B) Kelvin C) Fahrenheit D) Rankine Answer: B) Kelvin 11. Which of these is NOT a fundamental force in nature? A) Gravity B) Electromagnetic force C) Strong nuclear force D) Centrifugal force Answer: 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 Answer: A) Gauss’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 Answer: B) Nuclear fusion 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 Answer: D) all of the above 15. What is the unit of electric charge? A) Volt B) Ampere-hour C) Coulomb D) Ohm Answer: C) Coulomb 16. Which of these is a vector quantity? A) Speed B) Distance C) Displacement D) Temperature Answer: C) Displacement 17. The instrument used to measure atmospheric pressure is called a _______. A) barometer B) hygrometer C) altimeter D) manometer Answer: A) barometer 18. Which type of wave requires a medium to propagate? A) Electromagnetic wave B) Sound wave C) X-ray D) Gamma-ray Answer: B) Sound wave 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 Answer: C) Newton’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 Answer: C) Electromagnetic 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 Answer: A) Diffraction 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 Answer: D) Lorentz Force 23. What is the formula for kinetic energy? A) E=12mv2E = \frac{1}{2} mv^2E=21​mv2 B) $E=mgh$ C) E=mvtE = mv_tE=mvt​ D) $E=Fd$ Answer: A) E=12mv2E = \frac{1}{2} mv^2E=21​mv2 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 Answer: A) inertia 25. Which of these devices is used to measure electric current? A) Ammeter B) Voltmeter C) Galvanometer D) Ohmmeter Answer: A) Ammeter 26. The phenomenon of mirage is due to _______. A) reflection B) refraction C) diffraction D) interference Answer: B) refraction 27. Which type of mirror always produces a virtual image? A) Concave mirror B) Convex mirror C) Plane mirror D) Spherical mirror Answer: B) Convex 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 Answer: A) force 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 Answer: A) Boyle’s Law 30. What is the unit of magnetic field strength? A) Tesla B) Gauss C) Weber D) Ohm Answer: A) Tesla 31. Which of these is NOT a type of electromagnetic radiation? A) X-ray B) Gamma-ray C) Ultrasound D) Microwave Answer: C) Ultrasound 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 Answer: A) Faraday’s Law of Induction 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 Answer: C) joules 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 Answer: A) Concave 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 Answer: A) First Law of Thermodynamics 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 Answer: 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 Answer: A) Hertz 38. What is the energy stored in a capacitor? A) E=12CV2E = \frac{1}{2} CV^2E=21​CV2 B) E=12LI2E = \frac{1}{2} LI^2E=21​LI2 C) E=12mv2E = \frac{1}{2} mv^2E=21​mv2 D) E=12kx2E = \frac{1}{2} kx^2E=21​kx2 Answer: A) E=12CV2E = \frac{1}{2} CV^2E=21​CV2 39. Which of these materials has the highest conductivity? A) Rubber B) Glass C) Copper D) Wood Answer: C) Copper 40. The study of motion and the forces producing motion is called _______. A) geology B) physics C) chemistry D) biology Answer: B) physics 41. What is the phenomenon called when a wave bounces back after striking a boundary? A) Refraction B) Diffraction C) Reflection D) Interference Answer: C) Reflection 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 Answer: C) force 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 Answer: B) Coulomb’s Law 44. What is the unit of electrical resistance? A) Ohm B) Ampere C) Volt D) Watt Answer: A) Ohm 45. Which color of light bends the most when passing through a prism? A) Red B) Green C) Blue D) All colors bend equally Answer: C) Blue 46. Which scientist formulated the laws of motion? A) Isaac Newton B) Albert Einstein C) Galileo Galilei D) Johannes Kepler Answer: A) Isaac Newton 47. The phenomenon of a rainbow is caused by _______. A) reflection B) refraction C) diffraction D) dispersion Answer: 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 Answer: B) Charles’s Law 49. What is the SI unit of work and energy? A) Joule B) Newton C) Watt D) Pascal Answer: A) Joule 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. Answer: A) It always produces a virtual image.

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