Physics
Physics GK – Test Your Science Knowledge!
Explore fascinating Physics General Knowledge questions and answers covering concepts like motion, energy, light, electricity, and famous scientists. Perfect for students, quiz lovers, and competitive exam preparation. Sharpen your science knowledge with these interesting physics facts!
Practice questions 1-25
1. Who discovered the law of gravitation? – Isaac Newton
2. What is the SI unit of force? – Newton (N)
3. The speed of light is approximately how many km/s? – 3,00,000 km/s
4. What is the unit of electrical resistance? – Ohm (Ω)
5. Which instrument is used to measure atmospheric pressure? – Barometer
6. Which planet is known as the "morning star"? – Venus
7. What is the boiling point of water at sea level in Celsius? – 100°C
8. What is the chemical formula of water? – H₂O
9. What is the SI unit of power? – Watt (W)
10. What type of energy is stored in a stretched spring? – Potential Energy
11. What is the first law of motion called? – Law of Inertia
12. Who invented the electric bulb? – Thomas Edison
13. Which mirror is used in car rear-view mirrors? – Convex Mirror
14. Which type of lens is used to correct myopia? – Concave Lens
15. What type of current is supplied to homes? – Alternating Current (AC)
16. The rate of doing work is called? – Power
17. What is measured in volts? – Electric Potential / Voltage
18. The freezing point of water in Kelvin is? – 273 K
19. Sound waves cannot travel through which medium? – Vacuum
20. What is the SI unit of frequency? – Hertz (Hz)
21. Who discovered X-rays? – Wilhelm Rontgen
22. The first man to propose the heliocentric theory was? – Nicolaus Copernicus
23. What is the acceleration due to gravity on Earth? – 9.8 m/s²
24. What is the SI unit of pressure? – Pascal (Pa)
25. The device used to convert AC to DC is called? – Rectifier
Practice questions 26-55
26. Who is known as the Father of Modern Physics? – Albert Einstein
27. What is the SI unit of work? – Joule (J)
28. What type of lens is used in magnifying glasses? – Convex lens
29. What is the SI unit of energy? – Joule (J)
30. Which scientist discovered radioactivity? – Henri Becquerel
31. What is the unit of electric current? – Ampere (A)
32. Which type of mirror is used by dentists? – Concave mirror
33. Which law explains the relationship between current, voltage and resistance? – Ohm’s Law
34. Which planet has the strongest gravitational pull? – Jupiter
35. Which color of light has the longest wavelength? – Red
36. Which color of light has the shortest wavelength? – Violet
37. What is the SI unit of electric charge? – Coulomb (C)
38. What is measured using a thermometer? – Temperature
39. What is the force that opposes motion called? – Friction
40. Which energy source is called a renewable source? – Solar energy
41. Who invented the telephone? – Alexander Graham Bell
42. Which type of mirror is used in headlights of cars? – Concave mirror
43. What is the SI unit of speed? – m/s
44. Which instrument is used to measure electric current? – Ammeter
45. What is the SI unit of potential difference? – Volt (V)
46. Which device is used to measure electric resistance? – Ohmmeter
47. Which law states that “every action has an equal and opposite reaction”? – Newton’s Third Law of Motion
48. What is the speed of sound in air (approx.)? – 343 m/s
49. Which type of energy is possessed by a moving body? – Kinetic energy
50. What is the SI unit of power of a lens? – Dioptre (D)
51. Which instrument is used to measure relative humidity? – Hygrometer
52. What is the SI unit of momentum? – kg·m/s
53. Who is known as the Father of Nuclear Physics? – Ernest Rutherford
54. What is the SI unit of luminous
intensity? – Candela (cd)
55. What is the SI unit of magnetic flux? – Weber (WB)
Practice questions 56-85
56. What is the SI unit of temperature? – Kelvin (K)
57. What is the SI unit of density? – kg/m³
58. Which type of energy is produced from sunlight? – Solar energy
59. What is the SI unit of electric field? – Newton per coulomb (N/C)
60. Who discovered the electron? – J. J. Thomson
61. What is the SI unit of angular momentum? – kg·m²/s
62. Which type of mirror is used in solar cookers? – Concave mirror
63. What is the SI unit of capacitance? – Farad (F)
64. Which instrument is used to measure blood pressure? – Sphygmomanometer
65. Which law explains the buoyant force? – Archimedes’ Principle
66. Which is the only planet that rotates on its side? – Uranus
67. What is the SI unit of torque? – Newton metre (N·m)
68. What is the unit of Planck’s constant? – Joule second (J·s)
69. What type of energy is stored in food? – Chemical energy
70. Which scientist is associated with the laws of planetary motion? – Johannes Kepler
71. What is the SI unit of induction? – Henry (H)
72. What is the SI unit of sound intensity? – Decibel (dB)
73. Which force keeps planets in orbit around the Sun? – Gravitational force
74. Which phenomenon explains the bending of light? – Refraction
75. Which phenomenon explains the splitting of white light into colors? – Dispersion
76. Which type of energy is associated with motion? – Kinetic energy
77. What is the SI unit of heat? – Joule (J)
78. Which law states that “the volume of a gas is inversely proportional to pressure”? – Boyle’s Law
79. Which instrument is used to measure humidity? – Hygrometer
80. Which is the heaviest planet in the solar system? – Jupiter
81. Which scientist developed the theory of relativity? – Albert Einstein
82. What is the SI unit of electric power? – Watt (W)
83. Which type of energy is used in nuclear power plants? – Nuclear energy
84. Which phenomenon explains the twinkling of stars? – Atmospheric refraction
85. Which is the fastest known particle? – Photon
Practice questions 86-116
86. Which scientist invented the steam engine? – James Watt
87. Which device is used to measure speed of a vehicle? – Speedometer
88. What is the SI unit of electric conductance? – Siemens (S)
89. Which type of energy is stored in a battery? – Chemical energy
90. Which instrument is used to measure wind speed? – Anemometer
91. What is the SI unit of electric potential? – Volt (V)
92. Which instrument is used to measure altitude? – Altimeter
93. What is the SI unit of electric flux? – Volt metre (V·m)
94. Which scientist gave the law of electromagnetic induction? – Michael Faraday
96. Which is the hardest natural material? – Diamond
97. Which type of energy is possessed by water stored in a dam? – Potential energy
98. What is the SI unit of illumination? – Lux
99. What is the SI unit of radiation dose? – Gray (Gy)
100. Which phenomenon makes a pencil appear bent in water? – Refraction
101. Which instrument is used to measure gas pressure? – Manometer
102. Which energy is produced by moving water? – Hydroelectric energy
103. What is the SI unit of magnetic field strength? – Tesla (T)
104. Which instrument is used to measure electric power? – Wattmeter
105. Which scientist developed the concept of quantum mechanics? – Max Planck
106. What is the SI unit of inductance? – Henry (H)
107. What is the unit of gravitational constant (G)? – N·m²/kg²
108. Which type of wave is sound? – Longitudinal wave
109. What is the SI unit of pressure energy? – Pascal (Pa)
110. Which scientist invented the dynamo? – Michael Faraday
111. Which phenomenon causes the sky to appear blue? – Scattering of light
112. Which device is used to measure current and voltage both? – Multimeter
113. What is the SI unit of angular frequency? – rad/s
114. Which energy is released in an atomic bomb? – Nuclear energy
115. Which law explains the relationship between pressure, volume, and temperature of gases? – Gas Laws
(Combined Gas Law)
116. Which planet has the strongest magnetic field? – Jupiter
Practice questions 117-147
117. Which law explains why we wear seatbelts? – Newton’s First Law of Motion
118. Which instrument is used to measure temperature? – Thermometer
119. What is the speed of light in vacuum? – 3 × 10⁸ m/s
120. Which type of mirror is used in car rear-view mirrors? – Convex mirror
121. What is the SI unit of frequency? – Hertz (Hz)
122. Which device is used to convert solar energy into electricity? – Solar cell
123. Which scientist discovered X-rays? – Wilhelm Roentgen
124. What is the SI unit of electric charge? – Coulomb (C)
125. Which type of lens is used to correct short-sightedness? – Concave lens
126. Which type of lens is used to correct long-sightedness? – Convex lens
127. Which law explains why rockets move? – Newton’s Third Law of Motion
128. What is the SI unit of energy? – Joule (J)
129. Which scientist discovered the neutron? – James Chadwick
130. Which type of current is used in homes? – Alternating Current (AC)
132. What is the SI unit of resistance? – Ohm (Ω)
133. Which scientist discovered the electron? – J. J. Thomson
134. What is the unit of power? – Watt (W)
135. Which mirror is used in torch lights? – Concave mirror
136. What is the unit of work done? – Joule (J)
137. Which scientist discovered the law of gravitation? – Isaac Newton
138. Which type of energy is produced by a moving fan? – Kinetic energy
139. Which scientist discovered radioactivity? – Henri Becquerel
140. Which device is used to measure humidity? – Hygrometer
141. What is the SI unit of sound intensity? – Decibel (dB)
142. Which scientist discovered protons? – Ernest Rutherford
143. Which type of wave is light? – Transverse wave
144. Which device is used to measure electric current? – Ammeter
145. What is the SI unit of pressure? – Pascal (Pa)
146. Which device is used to s
tore electric charge? – Capacitor
147. What is the SI unit of force? – Newton (N)
Important questions and their answers related to natural science.
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