in

Physics Formulas

1. Density, d = Mass(M) / Volume(V) 

2. Speed, V = Distance travelled(s) / Time interval 

3. Velocity, V = Displacement / Time, units in m/s 

4. Force, F = Mass(m) * acceleration (a) 

5. Weight = mass(m) * acceleration due to gravity (g) 

6. Pressure, P = Thrust(T) / Area(A) 

7. Thrust, T = Pressure(P) * Area(A)

 8. Boyle’s Law : PV = Constant 

9. Number of images formed by two plane mirrors at an angle θ n = 360 / θ – 1 10. Magnification = Size of the image / Size of the object

11. Snell’s law : = ₁μ₂ = sin i / sin r

12. Relation between u, v and f 1/f = 1/u + 1/v

13. Equations of motion: (i) v = u + at (ii) s = ut + (1/2)at² (iii) v² – u² = 2as

14. Work, W = Force(F) * Displacement(S)

15. Work, W = F * S cos θ

16. Power, P = Work(W) / Time(T)

17. Potential energy (P.E.) = mgh

18. Kinetic energy (K.E.) = (1/2)mv²

19. Moment of force, M = Force(F) * Perpendicular distance

20. Mechanical advantage of wheel and axle = Radius of the wheel / Radius of the axle

21. Mechanical advantage of screw jack = Circumference of the screw / Pitch of the screw 

22. Density = Mass / Volume 

23. Specific gravity = Density of the substance / Density of Water 

24. Quantity of heat, Q = msΔt 

25. Calorific value = Heat produced / Unit mass 

26. Thermal efficiency = Heat utilised(Qu) / Total heat produced(Q₁) 

27. Fundamental principle of calorimetry : Heat lost by the hot body = Heat gained by the cold body 

28. Velocity of sound, V = mλ 

29. Distance between a crest and at rough = λ / 2 

30. Distance between two consecutive rests or trough = λ

31. Newton’s formula : Velocity of sound in a gas, V = √E / P 

32. Newton-Laplace formula : Velocity of sound in a gas, V = √λP / ρ 

33. Velocity of sound in a solid, V = √Y / P 

34. Refractive index of the prism, μ = sin(A + Dm / 2) / sin(A / 2) 

35. Power of a Lense, P = 1 / Focal length (in mts)(f) 

36. Relation between I, V, H : I² = V² + H² 

37. Charge, Q = CV 

38. Current, i = Q / t 

39. Coulomb’s inverse square law : F = (1 / 4πμ0)(q₁q₂ / r²) 

40. Newton’s law of universal gravitation : (i) F = G m₁m₂ / r₂ (ii) G = Fr² / m₁m₂

41. Relation between g and G : g = r² / GM 

42. Equation of motion of a body under gravity (i) v = u ± gt (ii) h = ut ±(1/2)gt² (iii) v² – u² = ±2gh 

43. Equation of motion for a freely falling body (i) v = gt …(u = 0) (ii) h = (1/2)gt² (iii) v² = ±2gh 

44. Maximum height reached by a body thrown up, h = u² / 2g 

45. Time of ascent = u / g 

46. Time of descent = u / g

47. Time of flight = 2u / g 

48. Velocity on reaching the ground : (i) v = √2gh (ii) u = √2gh 

49. Angular velocity, ω = Angular displacement / Time interval 

50. Angular velocity is given by, v = rω

51. Magnitude, L = mvr = mωr² 

52. Centripetal acceleration, a = v² / r 

53. Central force, F = mv² / r = mω²r 

54. Banking angle, θ = tan-1 (v² / rg) 

55. Relation between L, T, and g at a place in a simple pendulum: T = 2π√1 / g or g = 4π²1 / T² 

56. Distance between two successive modes or antinodes = λ / 2 

57. Distance between a mode and an antinode = λ / 4 

58. In SI system, inverse square law in free space: F = μ0 / 4π = (μ0 / 4π) (m₁ m₂ / r²) 

59. Relation between Absolute permeability (μ0) and Relative permeability (μr) of a medium : μ = μr μ0 

60. Magnetic field induction on the axial line B = (μ0 / 4π) (2m / d³)

 

61. Magnetic field induction on the equatorial line B =(μ0 / 4π)(m / d³) 

62. Magnetic moment, M = 2 lm 

63. Electric potential, V = Workdone(W) / Charge (Q) 

64. Potential difference of cells connected in series E = E₁ + E₂ + E₃ + … 

65. Ohm’s law: V = iR 

66. Resistance, R = S(1/A) 

67. Specific resistance, S = R(A/1) 

68. Resistances are connected in series : R = R₁ + R₂ 69. Resistance are connected in parallel : R = R₁R₂ / R₁ + R₂ 70. Electric power, P = V.i = i²R = V² / R …(V = iR)

71. Electrical work done, W = Vq 

72. Electrical work done, W = Vit 

73. Electrical work done, W = Vq = i²Rt 

74. Heat developed, Q = i²Rt / J 

75. Faraday’s first law : M = Zit 

76. Faraday’s second law : M₁ : M₂ : M₃ = E₁ : E₂ : E₃ = Z₁ : Z₂ : Z₃ 

77. Magnetic induction, B = μ0i / 2πr 

78. Force acting on a current carrying conductor placed in an external magnetic field : F = ilB

79. V₁ / V₂ = n₁ / n₂

80. V₁ / V₂ = i₂ / i₁ = n₁ / n₂

81. Albert Einstein’s mass, energy equivalence E = Δmc²

Leave a Reply

simple-ad

This is a demo advert, you can use simple text, HTML image or any Ad Service JavaScript code. If you're inserting HTML or JS code make sure editor is switched to "Text" mode.

avatar
  
grinwinkmrgreenneutraltwistedarrowshockunamusedcooleviloopsrazzrollcryeeklolmadsadexclamationquestionideahmmbegwhewchucklesillyenvyshutmouth

This site uses Akismet to reduce spam. Learn how your comment data is processed.

  Subscribe  
Notify of

Raman effect is due to

Important Units and measurements in Physics