Physics Notes Class 11th 12th

━━━━━━━━━━━━━━━━━━━━ ✅ 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 ❤️❤️

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