100 Physics Important Questions with Answers | SI Units & Formulas

Nazim Mustafa September 01, 2025

✅ 100 Physics Important Questions with Answers | SI Units & Formulas



Meta Description:
Physics ke 100 important questions with answers – SI units, formulas, laws, and OT (Operation Theater) applications explained for students and medical professionals.

📌 Table of Contents

  1. Physics Introduction
  2. Basics of Physics
  3. Force, Work, Energy & Power
  4. Motion & Speed
  5. Pressure & Gas Laws
  6. Heat & Temperature
  7. Sound & Light
  8. Electricity & Magnetism
  9. OT (Operation Theater) Related Physics
  10. Complete 100 Questions
  11. FAQs

1. Physics Introduction

Physics ka matlab: Matter, energy aur unke interactions ka study.

2. Basics of Physics

  1. Physics ka matlab? – Matter, energy aur unke interactions ka study.
  2. Length ki SI unit? – Meter (m).
  3. Mass ki SI unit? – Kilogram (kg).
  4. Time ki SI unit? – Second (s).

3. Force, Work, Energy & Power

  1. Force ka formula? – F = m × a.
  2. Force ki SI unit? – Newton (N).
  3. Work ka formula? – W = F × d.
  4. Work ki SI unit? – Joule (J).
  5. Energy ki SI unit? – Joule (J).
  6. Power ka formula? – P = Work / Time.
  7. Power ki SI unit? – Watt (W).

4. Motion & Speed

  1. Speed ka formula? – Distance / Time.
  2. Velocity aur Speed me farq? – Velocity direction ke sath speed hai.
  3. Acceleration ka formula? – (Final velocity – Initial velocity) / Time.

5. Pressure & Gas Laws

  1. Pressure ka formula? – Force / Area.
  2. Pressure ki SI unit? – Pascal (Pa).
  3. Atmospheric pressure ka normal value? – 760 mmHg ya 101.3 kPa.
  4. Boyle’s Law kya kehta hai? – Pressure × Volume = Constant (P ∝ 1/V at constant temperature).
  5. Charles’s Law kya kehta hai? – Volume ∝ Temperature (at constant pressure).

6. Heat & Temperature

  1. Heat ki SI unit? – Joule (J).
  2. Temperature ki SI unit? – Kelvin (K).
  3. Celsius aur Kelvin ka relation? – K = °C + 273.

7. Sound & Light

  1. Sound ki speed air me? – 343 m/s at 20°C.
  2. Sound ki SI unit? – Decibel (dB).
  3. Light ki speed vacuum me? – 3 × 10⁸ m/s.
  4. Reflection ka law? – Angle of incidence = Angle of reflection.

8. Electricity & Magnetism

  1. Electric current ki SI unit? – Ampere (A).
  2. Voltage ki SI unit? – Volt (V).
  3. Ohm’s Law ka formula? – V = I × R.
  4. Electromagnet ka use OT me? – Magnetic instruments pick karna.

9. OT (Operation Theater) Related Physics

  1. OT suction ka principle? – Negative pressure.
  2. Static electricity OT me harmful kyon hai? – Explosion ka risk due to anesthetic gases.
  3. Antistatic flooring ka purpose? – Static charge discharge.

10. Complete 100 Questions

Ab niche full list hai tumhare original format me:

✅ 100 Physics Questions with Answers (Full List)

  1. Physics ka matlab? – Matter, energy aur unke interactions ka study.
  2. Length ki SI unit? – Meter (m).
  3. Mass ki SI unit? – Kilogram (kg).
  4. Time ki SI unit? – Second (s).
  5. Force ka formula? – F = m × a.
  6. Force ki SI unit? – Newton (N).
  7. Work ka formula? – W = F × d.
  8. Work ki SI unit? – Joule (J).
  9. Energy ki SI unit? – Joule (J).
  10. Power ka formula? – P = Work / Time.
  11. Power ki SI unit? – Watt (W).
  12. Speed ka formula? – Distance / Time.
  13. Velocity aur Speed me farq? – Velocity direction ke sath speed hai.
  14. Acceleration ka formula? – (Final velocity – Initial velocity) / Time.
  15. Density ka formula? – Mass / Volume.
  16. Density ki SI unit? – kg/m³.
  17. Pressure ka formula? – Force / Area.
  18. Pressure ki SI unit? – Pascal (Pa).
  19. Atmospheric pressure ka normal value? – 760 mmHg ya 101.3 kPa.
  20. Boyle’s Law kya kehta hai? – Pressure × Volume = Constant (P ∝ 1/V).
  21. Charles’s Law kya kehta hai? – Volume ∝ Temperature.
  22. Pascal’s Law kya hai? – Enclosed fluid par pressure equally transmit hota hai.
  23. Archimedes Principle kya hai? – Fluid me dooba object ek upward force experience karta hai equal to displaced fluid ka weight.
  24. Buoyancy ka matlab? – Fluid ka upward force on immersed body.
  25. Torque ka formula? – Force × Perpendicular distance from axis.
  26. Simple machine ka example? – Lever, Pulley, Inclined plane.
  27. First class lever ka example? – Scissors.
  28. Second class lever ka example? – Wheelbarrow.
  29. Third class lever ka example? – Tweezers.
  30. Heat ki SI unit? – Joule (J).
  31. Temperature ki SI unit? – Kelvin (K).
  32. Celsius aur Kelvin ka relation? – K = °C + 273.
  33. Conduction kya hai? – Heat transfer by direct contact.
  34. Convection kya hai? – Heat transfer by fluid movement.
  35. Radiation kya hai? – Heat transfer without medium.
  36. Latent heat kya hai? – Phase change me heat without temperature change.
  37. Specific heat capacity kya hai? – Heat required to raise temperature of 1 kg substance by 1°C.
  38. Sound ki speed air me? – 343 m/s at 20°C.
  39. Sound ki SI unit? – Decibel (dB) for intensity.
  40. Ultrasonic sound ka frequency range? – Above 20,000 Hz.
  41. X-rays ka discovery kisne ki? – Wilhelm Roentgen.
  42. X-rays ka use OT me? – Imaging for fractures, locating instruments.
  43. Light ki speed vacuum me? – 3 × 10⁸ m/s.
  44. Reflection ka law? – Angle of incidence = Angle of reflection.
  45. Refraction ka matlab? – Light ka bending jab medium change hota hai.
  46. Lens ke types? – Convex, Concave.
  47. Convex lens ka use? – Magnifying glass, focusing light.
  48. Concave lens ka use? – Myopia correction.
  49. Microscope ka principle? – Magnification by combination of lenses.
  50. Endoscope ka principle? – Light reflection using optical fibers.
  51. Electric current ki SI unit? – Ampere (A).
  52. Voltage ki SI unit? – Volt (V).
  53. Resistance ki SI unit? – Ohm (Ω).
  54. Ohm’s Law ka formula? – V = I × R.
  55. Series connection me current? – Same in all components.
  56. Parallel connection me voltage? – Same across all branches.
  57. Fuse ka purpose? – Circuit ko overload se bachana.
  58. Earthing ka purpose? – Electric shock se protection.
  59. Magnet ka North aur South pole? – Always in pairs.
  60. Electromagnet ka use OT me? – Magnetic instruments pick karna.
  61. ECG ka full form? – Electrocardiogram.
  62. EEG ka full form? – Electroencephalogram.
  63. MRI ka full form? – Magnetic Resonance Imaging.
  64. CT scan ka full form? – Computed Tomography.
  65. Ultrasound ka principle? – High frequency sound reflection.
  66. Laser ka full form? – Light Amplification by Stimulated Emission of Radiation.
  67. Laser ka medical use? – Eye surgery, tissue cutting.
  68. Diathermy ka principle? – High frequency current se tissue heat karna.
  69. Thermometer ka use? – Temperature measure karna.
  70. Clinical thermometer ka range? – 35°C to 42°C.
  71. BP apparatus ka name? – Sphygmomanometer.
  72. Aneroid sphygmomanometer kya hai? – Without mercury BP measuring device.
  73. Stethoscope ka function? – Body sounds sunna.
  74. OT suction ka principle? – Negative pressure.
  75. Vacuum ka meaning? – Space without matter.
  76. Venturi effect kya hai? – Fluid speed badhne par pressure kam hota hai.
  77. Syringe ka working principle? – Pascal’s law.
  78. IV drip ka principle? – Gravity.
  79. Centrifuge ka use? – Components separate karna by spinning.
  80. pH ka meaning? – Power of Hydrogen (acidity/alkalinity measure).
  81. Neutral pH value? – 7.
  82. Acidic pH range? – Less than 7.
  83. Basic pH range? – More than 7.
  84. Glass ka refractive index? – ~1.5.
  85. Air ka refractive index? – ~1.0003.
  86. Electricity ka danger level human body me? – 50 mA se upar.
  87. Static electricity OT me harmful kyon hai? – Explosion ka risk due to anesthetic gases.
  88. Antistatic flooring ka purpose? – Static charge discharge.
  89. Fluid pressure ka formula? – P = h × ρ × g.
  90. Gravity ki acceleration value? – 9.8 m/s².
  91. Rotatory motion ka example OT me? – Drill machine.
  92. Linear motion ka example OT me? – Surgical saw.
  93. Pulley ka medical use? – Patient lifting systems.
  94. Screw ka medical use? – Orthopedic fixation.
  95. Wedge ka example OT me? – Surgical blade.
  96. Work done zero kab hota hai? – Jab displacement zero ho.
  97. Momentum ka formula? – Mass × Velocity.
  98. Kinetic energy ka formula? – ½ mv².
  99. Potential energy ka formula? – m × g × h.
  100. OT me physics kyon zaroori hai? – Machines, instruments, sterilization aur patient safety samajhne ke liye.

✅ FAQs

Q: Physics ka basic definition kya hai?
Ans: Matter, energy aur unke interactions ka study.

Q: SI unit of force kya hai?
Ans: Newton (N).

Q: OT me physics kyon zaroori hai?
Ans: Machines, instruments, sterilization aur patient safety samajhne ke liye.

✅ Conclusion

Yeh 100 important physics questions with answers aapke exams aur medical OT understanding ke liye best hain. Is list me SI units, formulas, laws aur practical applications cover kiye gaye hain.


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