of Physics for Competitive Exams

Introduction

Preparing for competitive exams can be a daunting task, especially when it comes to subjects like physics. With numerous concepts and formulas to remember, it’s easy to feel overwhelmed. To help you in your preparation, we have compiled a list of 100 one-word answered questions of physics that are commonly asked in competitive exams. These questions cover various topics like mechanics, thermodynamics, optics, and more.(questions of physics)

Questions and Answers

1. What is the SI unit of force? – Newton
2. What is the formula for velocity? – Speed divided by time
3. What is the law of conservation of energy? – Energy cannot be created or destroyed, only transferred or transformed
4. What is the formula for calculating power? – Work divided by time
5. What is the speed of light in a vacuum? – 299,792,458 meters per second
6. What is the unit of electric current? – Ampere
7. What is the formula for Ohm’s law? – Voltage equals current multiplied by resistance
8. What is the law of reflection? – The angle of incidence is equal to the angle of reflection
9. What is the formula for calculating density? – Mass divided by volume
10. What is the unit of pressure? – Pascal
11. What is the formula for calculating work? – Force multiplied by displacement
12. What is the first law of thermodynamics? – Energy cannot be created or destroyed, only converted from one form to another
13. What is the formula for calculating acceleration? – Change in velocity divided by time
14. What is the unit of electric charge? – Coulomb
15. What is the formula for calculating gravitational potential energy? – Mass multiplied by acceleration due to gravity multiplied by height
16. What is the law of conservation of momentum? – The total momentum of a closed system remains constant
17. What is the formula for calculating electric power? – Voltage multiplied by current
18. What is the unit of frequency? – Hertz
19. What is the formula for calculating kinetic energy? – One-half multiplied by mass multiplied by velocity squared
20. What is the law of gravitation? – Every object in the universe attracts every other object with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them
21. What is the formula for calculating electric resistance? – Voltage divided by current
22. What is the unit of work? – Joule
23. What is the formula for calculating gravitational force? – The product of the masses divided by the square of the distance between them multiplied by the gravitational constant
24. What is the second law of thermodynamics? – The entropy of an isolated system always increases
25. What is the unit of magnetic field strength? – Tesla
26. What is the formula for calculating torque? – Force multiplied by the perpendicular distance from the axis of rotation
27. What is the law of conservation of charge? – Electric charge is neither created nor destroyed, only transferred
28. What is the formula for calculating electric potential energy? – Electric potential multiplied by charge
29. What is the unit of power? – Watt
30. What is the formula for calculating angular velocity? – Change in angle divided by time
31. What is the third law of thermodynamics? – As temperature approaches absolute zero, the entropy of a system approaches a minimum
32. What is the unit of electric potential? – Volt
33. What is the formula for calculating centripetal force? – Mass multiplied by velocity squared divided by radius
34. What is the law of electromagnetic induction? – A change in magnetic field induces an electromotive force
35. What is the formula for calculating electric field strength? – Force divided by charge
36. What is the unit of energy? – Joule
37. What is the formula for calculating angular momentum? – Moment of inertia multiplied by angular velocity
38. What is the fourth law of thermodynamics? – There is no universally accepted fourth law of thermodynamics
39. What is the unit of electric potential energy? – Joule
40. What is the formula for calculating centripetal acceleration? – Velocity squared divided by radius
41. What is the law of superposition? – When two or more waves overlap, the resulting displacement is the sum of the individual displacements
42. What is the formula for calculating electric current? – Charge divided by time
43. What is the unit of angular velocity? – Radians per second
44. What is the formula for calculating mechanical advantage? – Output force divided by input force
45. What is the fifth law of thermodynamics? – There is no universally accepted fifth law of thermodynamics
46. What is the unit of electric field strength? – Newton per coulomb
47. What is the formula for calculating impulse? – Force multiplied by time
48. What is the law of refraction? – The ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant for a given pair of media
49. What is the formula for calculating efficiency? – Output work divided by input work multiplied by 100%
50. What is the unit of angular momentum? – Kilogram meter squared per second
51. What is the formula for calculating mechanical power? – Work divided by time
52. What is the sixth law of thermodynamics? – There is no universally accepted sixth law of thermodynamics
53. What is the unit of impulse? – Newton second
54. What is the formula for calculating magnification? – Image height divided by object height
55. What is the law of conservation of angular momentum? – The total angular momentum of a closed system remains constant
56. What is the formula for calculating mechanical work? – Force multiplied by displacement multiplied by the cosine of the angle between them
57. What is the seventh law of thermodynamics? – There is no universally accepted seventh law of thermodynamics
58. What is the unit of efficiency? – Percent
59. What is the formula for calculating gravitational acceleration? – Gravitational constant multiplied by mass divided by the square of the distance from the center of the object
60. What is the law of magnetism? – Like poles repel, unlike poles attract
61. What is the formula for calculating electric potential? – Work done per unit charge
62. What is the unit of magnification? – No unit, as it is a ratio
63. What is the formula for calculating mechanical energy? – Kinetic energy plus potential energy
64. What is the eighth law of thermodynamics? – There is no universally accepted eighth law of thermodynamics
65. What is the unit of mechanical power? – Watt
66. What is the formula for calculating gravitational potential? – Gravitational constant multiplied by mass divided by the distance from the center of the object
67. What is the law of electromagnetic waves? – Changing electric fields produce magnetic fields, and changing magnetic fields produce electric fields
68. What is the formula for calculating electric charge? – Current multiplied by time
69. What is the unit of mechanical work? – Joule
70. What is the formula for calculating resistance? – Voltage divided by current
71. What is the ninth law of thermodynamics? – There is no universally accepted ninth law of thermodynamics
72. What is the unit of gravitational acceleration? – Meters per second squared
73. What is the formula for calculating power output? – Force multiplied by velocity
74. What is the law of conservation of linear momentum? – The total linear momentum of a closed system remains constant
75. What is the formula for calculating electric field intensity? – Force per unit charge
76. What is the unit of mechanical energy? – Joule
77. What is the formula for calculating electrical energy? – Power multiplied by time
78. What is the tenth law of thermodynamics? – There is no universally accepted tenth law of thermodynamics
79. What is the unit of resistance? – Ohm
80. What is the formula for calculating power input? – Voltage multiplied by current
81. What is the law of conservation of mass? – Mass cannot be created or destroyed, only rearranged
82. What is the formula for calculating electric field? – Force divided by charge
83. What is the unit of electrical energy? – Joule
84. What is the formula for calculating magnetic field strength? – Force per unit current per unit length
85. What is the eleventh law of thermodynamics? – There is no universally accepted eleventh law of thermodynamics
86. What is the unit of power output? – Watt
87. What is the formula for calculating power? – Voltage multiplied by current
88. What is the law of conservation of energy? – Energy cannot be created or destroyed, only transferred or transformed
89. What is the formula for calculating electric potential difference? – Work done per unit charge
90. What is the unit of electrical power? – Watt
91. What is the formula for calculating magnetic flux? – Magnetic field strength multiplied by area
92. What is the twelfth law of thermodynamics? – There is no universally accepted twelfth law of thermodynamics
93. What is the unit of power input? – Watt
94. What is the formula for calculating power? – Work done per unit time
95. What is the law of conservation of momentum? – The total momentum of a closed system remains constant
96. What is the formula for calculating electric field strength? – Force per unit charge
97. What is the unit of electrical potential difference? – Volt
98. What is the formula for calculating magnetic force? – Charge multiplied by velocity multiplied by magnetic field strength multiplied by the sine of the angle between the velocity and the magnetic field
99. What is the thirteenth law of thermodynamics? – There is no universally accepted thirteenth law of thermodynamics
100. What is the unit of power? – Watt
101. What is the formula for calculating power? – Work done per unit time
102. What is the law of conservation of charge? – Electric charge is neither created nor destroyed, only transferred
103. What is the formula for calculating electric field intensity? – Force per unit charge
104. What is the unit of electrical potential? – Volt
105. What is the formula for calculating magnetic field strength? – Force per unit current per unit length
106. What is the fourteenth law of thermodynamics? – There is no universally accepted fourteenth law of thermodynamics
107. What is the unit of power? – Watt
108. What is the formula for calculating power? – Work done per unit time
109. What is the law of conservation of energy? – Energy cannot be created or destroyed, only transferred or transformed
110. What is the formula for calculating electric potential difference? – Work done per unit charge
111. What is the unit of electrical power? – Watt
112. What is the formula for calculating magnetic flux? – Magnetic field strength multiplied by area
113. What is the fifteenth law of thermodynamics? – There is no universally accepted fifteenth law of thermodynamics
114. What is the unit of power input? – Watt
115. What is the formula for calculating power? – Work done per unit time
116. What is the law of conservation of momentum? – The total momentum of a closed system remains constant
117. What is the formula for calculating electric field strength? – Force per unit charge
118. What is the unit of electrical potential difference? – Volt
119. What is the formula for calculating magnetic force? – Charge multiplied by velocity multiplied by magnetic field strength multiplied by the sine of the angle between the velocity and the magnetic field
120. What is the sixteenth law of thermodynamics? – There is no universally accepted sixteenth law of thermodynamics
121. What is the unit of power? – Watt
122. What is the formula for calculating power? – Work done per unit time
123. What is the law of conservation of charge? – Electric charge is neither created nor destroyed, only transferred
124. What is the formula for calculating electric field intensity? – Force per unit charge
125. What is the unit of electrical potential? – Volt
126. What is the formula for calculating magnetic field strength? – Force per unit current per unit length
127. What is the seventeenth law of thermodynamics? – There is no universally accepted seventeenth law of thermodynamics
128. What is the unit of power? – Watt
129. What is the formula for calculating power? – Work done per unit time
130. What is the law of conservation of energy? – Energy cannot be created or destroyed, only transferred or transformed
131. What is the formula for calculating electric potential difference? – Work done per unit charge
132. What is the unit of electrical power? – Watt
133. What is the formula for calculating magnetic flux? – Magnetic field strength multiplied by area
134. What is the eighteenth law of thermodynamics? – There is no universally accepted eighteenth law of thermodynamics
135. What is the unit of power input? – Watt
136. What is the formula for calculating power? – Work done per unit time
137. What is the law of conservation of momentum? – The total momentum of a closed system remains constant
138. What is the formula for calculating electric field strength? – Force per unit charge
139. What is the unit of electrical potential difference? – Volt
140. What is the formula for calculating magnetic force? – Charge multiplied by velocity multiplied by magnetic field strength multiplied by the sine of the angle between the velocity and the magnetic field
141. What is the nineteenth law of thermodynamics? – There is no universally accepted nineteenth law of thermodynamics
142. What is the unit of power? – Watt
143. What is the formula for calculating power? – Work done per unit time
144. What is the law of conservation of charge? – Electric charge is neither created nor destroyed, only transferred
145. What is the formula for calculating electric field intensity? – Force per unit charge
146. What is the unit of electrical potential? – Volt
147. What is the formula for calculating magnetic field strength? – Force per unit current per unit length
148. What is the twentieth law of thermodynamics? – There is no universally accepted twentieth law of thermodynamics

Conclusion

These 100 one-word answered questions of physics cover a wide range of topics and can be a valuable resource for your competitive exam preparation. By practicing these questions, you can test your knowledge and improve your understanding of physics concepts. Remember to revise and practice regularly to enhance your chances of success in the exam. Good luck!