Physics Notes Class 11th 12th

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✅ QUICK REVISION ✅ ✅ FORMULAS ✅ 🎯1. Formulas related to force: 🔰F = ma 🔰F = kx 🔰F = m(vf² - vi²/2S) 🔰F = mv/t 🔰F = md/t² 🔰F = m(vf - vi)/t 🔰F = Area × density × velocity² 🔰F = 1/2 mv²/d 🔰F = 1/2 Pv/d 🔰F = Power/velocity 🔰Fc = mv²/r 🔰Fc = mrw² 🔰Fc/2 = mv²/2r 🔰Fc = 2K.E/r 🔰F = Area × Stress 🔰F = pir² × stress 🔰F = YA × Strain 🔰F = YAl/L 🔰F = pressure × area 🔰F = change in momentum × time interval 🔰F = - 2mVx × Vx/2l 🔰F2 = F1/A1 × A2 🔰F = qE 🔰F = kQ/r² 🔰F = ILB sintheta 🔰F = q (v × B) 🔰F = qE + q(v × B) 🎯2. Formulas related to energy and work 👉Fd = k.e 👉mgh = 1/2 mv² 👉E = 1/2 kx² 👉E = Ve 👉E = nhf 👉E = nhc/lambda 👉E = Pc 👉K.e = hf - work function = hf - hf° = hf - hc/w° (here w° is cutt off wavelength) 👉E = 1/2 Pv 👉mv²/2r= Fc/2 👉K.E/r = Fc/2 👉K.E = Fc×/r/2 👉K.e = 1.5 KT 👉E = VQ 👉E = Power × time 👉E = Fvt 👉% loss in K.e = v1² - v2²/v1² × 100 👉% loss in P.e = h1² - h²/h1² × 100 👉Energy lost due to air friction(Fh) = 1/2mv² - mgh (when body is thrown upward) 👉Energy lost due to air friction(FS) = mgh - 1/2mv² (when body is thrown downward) 👉E = 1/2 CV² (capacitor) 👉E = R × hc (R is Rydberg' constant) J = m-¹ × Js ms-¹ 👉hf kalpha x rays = EL - Ek hf kbeta x rays = EM - Ek 👉Binding energy = mass defect × c² 👉W = Fd Costheta 👉W = nmgh (when person is climbing stairs) 👉W = n(m+m) gh (when person is climbing stairs with some load) 👉W = 0mgh + 1mgh + 2mgh + 3mgh ....... (in case of stacking bricks. For ist brick h=0. For 2nd brick h=1. For 3rd brick h=2 and so on) 👉W = Fd = PA × change in V 👉W = Q - change in U 👉Q = mc × change in T T/273.16 = Q/Q3 (Thermodynamic scale) 👉W = I²Rt 👉W = emf×charge 👉W = VQ 👉W = 1/2 lF 👉W = YAl²/2L 👉W = StressAl²/2Strain 👉W = PressureAl²/2Strain 👉W = Fl²/2Strain 🎯3. Formulas related to Power 💥P = Fv 💥P = E/t 💥P = n(mgh/t) 💥P = Fd/t 💥P = mv²/2t 🎯4. Formulas related to distance, displacement, velocity and accelration 📝d = vt 📝d = at² 📝d = (vf + vi/2) ×t 📝d = 5t² (for distance in 'n' seconds) 📝d = 5(2tn - 1) (for distance in 'nth' second) 📝d = 1/2 mv²/F 📝d = vit + 5t² 📝d = v × underroot 2H/g 📝d = vt = x°wt = x°2pi/T × t = x°2pift 📝x = x° Sin wt 📝x = x° Sin (underroot k/m) t vf = vi + at 📝2as = vf² - vi² 📝2as = (vi + at)² - vi² 📝2as = vf² - (vf - at) ² 📝v = underroot Vfx² + Vfy² 📝v = Power/Force 📝v = 2×K.E/momentum (k.e = 1/2 Pv) 📝v² = 2×Power×time/mass (P = mv²/2t) v = underroot 2as v = underroot gr (speed at highest point in a verticle circle) v = underroot 5gr (speed at lowest point in a verticle circle) 📝v² = 2FS/m 📝v² = 2E/m 📝v² = 2Ve/m 📝v = eBr/m (velocity of particle under action of magnetic force along circular path) 📝v² = Force/Area.Density 📝v = w underroot x°² - x² 📝v = underroot k/m × underroot x°² - x² 📝v = x°w (at mean position where x=0) 📝v = x° underoot k/m 📝v = v° underroot 1 - x²/x°² (for determining ratio b/w inst. Velocity and maxi. Velocity) 📝v= x°2pif = x°2pi/T 📝a = x°w² = x°w.w = vw = v.2pif Common velocity = m1v1/m1+m2 📝vi² = Rg/Sin2theta 📝v = underoot Tension×length/mass 📝V = 2pi ke²/nh (speed of e- in nth orbit) 📝Vn = V/n 📝v = nh/2pimr (lambda = 2pir and lambda=h/p) 📝ma = kx 📝a = kx/m (SHM) 📝a = - gx/l (Simple pendulum) 📝ac = v²/r 🎯5. Formulas related to wavelength 'w' ❌w = v/f ❌w = 1/wave number ❌w1 = 2l (when pipe is opened at both ends) ❌w1 = 4l (when pipe is opened at one end) ❌Delta w = Us/f (doppler shift) Wavelength for obs. = w - delta w = v/f - Us/f ❌w = hc/Ve ❌w = hc/E ❌w = h/mv ❌w = h/P as P = underroot 2mE so ❌w = h/underroot 2mE (de Broglie wavelength) ❌w = underroot 150/V A° (short method for de Broglie wavelength. This formula is applicable only for e-) ❌1/w = RH (1/p²-1/n²) ❌Wmaxi/Wmini = n²/n²-p² (for determining ratio b/w maxi. Wavelength to mini. Wavelength for series of atomic spectrum) ❌w = 2pir/n (n is no. of loops in a circle Give Heart ❤️❤️ Join WhatsApp Group https://whatsapp.com/channel/0029Va9492L3QxRv5MtNFF0Y

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🌟 Important Points of NCERT 🌟 1. 1770 : Joseph Priestley - Essential role of air in growth of green plant. 2. 1774 : Joseph Priestley - Discovered O2. 3. 1831 : Robert Brown - Ist discovered and described nucleus. 4. 1838 : Schleiden (German Botanist) - Work on plants. 5. 1839 : Schwann(British Zoologist) - Work on both plants & animals. 6. 1855 : Rudolf Virchow - Omnis cellula-e-cellula (cells arises from pre-existing cells). 7. Life originate from pre-existing life : Pasteur (Yeast). 8. Life originate from non-living (decaying & rotting matter) : Spontaneous generation. 9. Life originate from pre-existing non-living organic molecules (RNA, Protein)- Oparin (Russia) & Haldane (England)- Chemical Evolution. 10. : Mendal experiment on garden pea. (7 years) 11. 1860 : Julius von Sachs - Developed hydroponics. 12. 1865 : Mendal published his work. 13. 1866 : Langdon Down - Down’s syndrome. 14. 1869 : Friedrich Meischer - Ist identified DNA and named it nuclein. 15. 1891 : Henking - Discovered X-body. 16. 1891 : Fossil discovered in Java - Homo erectus. 17. 1892 : Ivanowsky - Discovered virus. 18. 1898 : Beijerinek - Contagium vivum fluidum (infectious living fluid). 19. 1898 : Camillo Golgi - Discovered (observed) G.B. 20. 1900 : de Vries, Corre ns and von Tsche rmak inde pende ntly rediscovered Mendel’s results. 21. 1902 : Chromosome movement during meiosis has been worked out. 22. 1905 : Law of limiting factor (Blackmann). 23. 1928 : Fredrick Griffith - Transforming experiment with Streptococcus pneumoniae (Diplococcus). 24. 1935 : Stanley - Crystallised viruses. 25. 1937 : Ramde o Misra obtained Ph.D. in Ecology from Lee ds university (U.K.). 26. 1938 : Coelocanth fish caught in South Africa. 27. 1945 : Fleming, Chain & Florey - Awarded Nobel prize. 28. 1950 : Watson obtained Ph.D. on a study of the effect of hard X-rays on bacteriophage multiplication. 29. 1951 : Family planning programme started in India. 30. 1952 : Hershey & Chase-experiment on bacteriophage or Bacterial virus gives unequivocal proof that DNA is the genetic material. 31. 1953 : Miller experiment - Methane, ammonia, hydrogen & water vapour. 32. 1953 : Watson & Crick - Double helical structure of B-DNA & replication scheme. 33. 1953 : Palade : Discovered ribosome. 34. 1954 : Ramachandran - Triple helical model of collagen, published in Nature. 35. 1954 : Crick complete d Ph.D. on a thesis “X-rays diffraction : polypeptides and proteins. 36. 1958 : Meselson & Stahl - Work on E.coli proves semiconservative replication of DNA in prokaryotes. 37. 1958 : Taylor - Work on Vicia faba proves semiconservative replication of DNA in eukaryotes. 38. 1960 : Katherine Esau - Published “Anatomy of Seed Plants.” 39. 1961 : Melvin Calvin - Nobel Prize. 40. 1962 : Watson, Crick and Wilikins - Nobel Prize. 41. 1963 : Wheat varieties (Sonalika & Kalyan sona) introduced. 42. 1963 : Two enzyme responsible for restricting growth of bacteriophage in E.coli were isolated. 43. 1966 : Derivative of IR-8 & Taichung native-I introduced. 44. 1969 : Whittaker - Five kingdom classification. 45. 1971 : Govt. of India legalized MTP. 46. 1971 : Diener- Discovered Viroid(free RNA without capsid). 47. 1972 : Singer & Nicolson - Fluid mosaic model. 48. 1972 : Stanley Cohen & Herbert Boyer - Formed Ist recombinant DNA. 49. 1972 : Establishme nt of NCEPC - National Committe e for Environmental Planning & Coordination. 50. 1974 : Water act. 51. 1980 : Joint forest management, (JFM). 52. 1981 : AIDS was Ist reported. 53. 1981 : Air act. 54. 1983 : Eli Lily (An American company) produces insulin in E.coli by recombinant DNA technology. 55. 1984 : Establishment of MOEF : Ministry of Environment & Forest. 56. 1986 : Environment Protection Act. 57. 1987 : Montreal protocol. Held in Montreal, Canada. 💐 Share & React ❤️ below. Join For More *https://whatsapp.com/channel/0029Va9492L3QxRv5MtNFF0Y*

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