formula sheets (all chapters), Cheat Sheet of Physics

A Physics formula sheet is a collection of important formulas used to solve numerical and conceptual problems in physics. It serves as a quick reference tool for students, helping them revise key concepts efficiently and save time during problem-solving. For example, in Electrostatics, formulas like Coulomb’s Law help calculate the force between charges, while in Current Electricity, Ohm’s Law relates voltage, current, and resistance. In Optics, formulas are used to determine image formation, and in Modern Physics, they explain phenomena like photoelectric effect and atomic structure. Using a formula sheet regularly helps in improving memory, accuracy, and speed. It also helps students understand when and how to apply a particular formula in different situations. In conclusion, a well-prepared Physics formula sheet is an essential study tool that supports effective learning and better performance in examinations.

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2025/2026

Uploaded on 03/19/2026

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NewtonDesk . com e———— “<< Name + Representation + Values : Hock GuorE: 6. @SX10 2" Ts Chongenericlectron__.@= Vco2rx1o ce Peemitivityepiyacuuny—-€.= 8.25 x10? CNTs ferimenbility of wacwums —- Mo= un x10" NN /Ar KeUlomb'siconstant—- K = Vune, =4x1oINm*/c%s Foradeynesnstant? ——F =qcuescjmo)> IMASS oP TAMTRIECHOAT——-me = 9.1 x10 kg y? ag 6126 XK 10" 27 kg IMoSSTSPIO NeWEONG ——- My = 1.6744 X10727 kg ® (Atomic mass unit} ss y= = 66 x{o2! Ky o— &, [Prcornicemaoss WAIT WH MeVE our = 931.49 Mev [c2 [Stephan- Boltzmann const.) .o- = ark b wine et ‘i e (Ryaberg Constant) R= 1.097 X10'my! © é © |Gohrimaeten) __. p&y = 9.27 x10" T/T) spr @ (Bohr Reais} —_____.9,=0.529 X10 om & A) @ (Speed of light} sac . 3x10% m/s o~ HA {Se @ Cue aay @ Electric Field: re @ Electric Potential: wor) = are m3 (scalar Quantity J] @ Electrostatic Energy. Y--1 ad [atcreichive force ] ie UNEo @ Electric Dipole Moment : pee os aa “4 e- = fe > iy @ Potential of. o Dipole: Nr) = a pt pCosg pee (small elipole ) 4NEo Se VUr) TD. H@@e +H H®e@eo He 4 - Slabs in parallel : Ceq = Sef". + Az ka) Parallel . Steady State: t20o Vo = & =Imale © CeO ec @©eooe HE Isolated Spherical Capacitor: C= 4néeR + —w . Cylindrical capacitor: C= 2NGol + | 4 pa bn(re [n) z Energy Stored in Capacitor. y = $Qv= SO Go p RST Capacitance of ppc in medium: ¢ = kKesAld Kz dielectric const. Combination of Capacitors : CG Ceq Series combination? = Fifty om os 7 wile Shae ter Cea at NSY c farallel combination: Nope t th = les . e 4S Force between plates of parllel plate'C': fi i bed Energy density in field E: U/y = +€0 €% gangs Capacitors with more than one Dielectric Slabs: aly | he Slabs in Series”: Coa e Es Ret Series a. - 2. ti Ny <— aA £ = equivalent : oe re ie As : K free Space of adtelechic Az Charging and discharging ofa Capacitor ‘ SBE von Desk. come Charging Equation: Ve = V/e = e(1-€ tRC) Time constant T= Real. Discharging eq) + vy. = % ~tiRe EOE c= Smee” Girrent: I= ae = Nenva Current density: j= Tiqo=c€ = Neva [Naz drift velo.] iF speed: vq -eBt = Be P : ie nea Resistance of a wire. R = {2 = OG ‘ € Specific resistance or Resistivity: f= «m= + conductivity ofawire: g = (Ne*T)/m. Temperature dependence of Resistance: R= Ro (1+ XAT ) of Resistivity. S= fo (14+ x aT) X= Temperature. coeff, Ohm's Law: Ver or V=1R + General form Microscopic form: Ji Eo eNewtonDesk. come q. e ee w. W. H@® @C8©0COFHOH HO Kirchhoff's Lows: Tivo laws : The junction Law: Dincaeet =o or Tincoming = Loutgoing The Woop lauds Diigop AVI =O oF Potential gain = Potential loss Combinations of Resistance in circuits: oon es Series combination : Req = Ry tRo We Parallel combination: 1 2 1 44 ANA Req Ry AD “R Electric Power: P = y2R = Vig = ty “ st Heat dissipated or Transferred: H = pt = I2Rt =V7tig = VI+ Electromotive Force (EMF) : In dosed ckt : Veuttery = © - TT internat wheat stone Bridge. Ri Ra Balancing condition: Poe Re 20 Ro Ry R3 Ry = Conversions of Galvano meter : dda As an Ammeter : hee re fl Y > ++ -L@—__— a ee eae lg G = (1-tg)S ' 5 \ tei WWh—_@p—$ 1 t ane eee es : As 4 Voltmeter: = ae Voltmeter Vag = ly (R+G) Newton Desk .com > Rei . ees Pelher Heat eltier Effect. emf e ae - reed Seeback Effect : ~—>Newton Desk. com & Mermo-fm: e=aT+tb1? fe 1. Thermoelectric P: de ~ q4 oT aT Neutral Heme Tyee ou Inversion Temp: Ti = -201b % T @ | Thornson Effect. e= au =o AT a4 @ @ ts Hi. I. faraday's Law of Electtolysis : mass deposit m = Wik = 7 eat ZL = dechochemjcal equivalent.5 E= chemical equivalent . Meter Bridge: wheatstone bridge principle. Zero deflection | balancing condition: X = RL / ) Potentiometer : ae Potential gradient of meter V = (2) i EMF of unknown ckt: E =(ue\* 5 sa a Internal resistance of reR (h 4 ') ankasin 7 battery in unknown cht: NewtonDesk-com @ Motion of charge In Magnetic field » I. Straight tine: widens: “VxB=0 or ViiR v TL. Uniform circular motion: r= ge for Vie Ogg W. Helicalpacthi(shown)2 rm v. ‘ = nM ae B Pacth-(shown) + 1. Oe ag ae rth > Pitch; P= Vu e ~ NewtonDesk. com @ Alternating current : T= To tinwt+o) ; w= 2H /T @ Aiternating Voltage? v= Vo sin (wt+ ~) > w= WT @ Average current in Re: Pa siaeypeee Cy voltage average: Yo aT i Me ae 8 r) WT & @ tHaif average voluues : Lo-T/2 5 half ycle} i T. (gERERES: Ly, = 210 (ae Sean's . Te MOORE? Vay = ovefRyib 01637 Vo L @ Root Mean Square value: a— : : I, Citrrentprisy Tims = To lps = 0-JotTs ee es DL. Voltage PMS: Vis = Vols =0:70T Vo @NewtonDesk.com > 2 @ Energy dissipated across’ in ACciramit: = Inms AT @ Energy loss across Gpaciter and Inductor: Ec = £,-0. [stored ) @ Reactance Cequivalent Resistance) » I. Gopacitive Reactence » Xe= ie -«sL. Undluctive Reactances x, = wl @ Impedance ( equivalent resistance of circuit)’ B = €/1 @ Phase of current and voltage in phasor Dingram: ,. caps cure j V © Ahead Potential T. for Gopacitor : >. =+Ki2 Kee 90° tT. For Inductor: , =-n/o + at >—>V , ‘q0° Ne Go" IR I. for Resistor : bp = 0 : @ Copacitive circuit (R-C) Series : eee I. Current’. I.= Lo sit +p) : 1 te | Ve T. Potential: V = Vo sinwt 5 where D ia re ‘ pe o No = Te [Roa V=Vo Sigurt Valo ; = z A BEF No 3 Te Ir. ‘Phase é tan Crags WL. 'Tinpedance: z Me = [Re @ Inductive circuit CA-L) Series: x * Le current HL as CoS Wt ATCA) TD. Volkage: v= Vo costot +6) — vit) where , Noiseds R24 w uz WH Phase ~ p= tan! (Bb) beeen neste (ds @ ick circuit (series): Lee 3. eGieeeite? T = I, cosut até) ave) Be Inductive’ okt? XL > Xc OS) TL) Resonance condition? current: T= Vo Sin (wt) i= ee = | () Impedance: Z = R © Phase: 9= 0° \ Sa 1 | @ Tronsformer : Mutual Incducton ¢ Ny - No poF tan Ce oa Chet lo ) a of &M waves in Vacuum 2c = i Angles q 2t= Lr SCOSFKHOSOCOHHOCOHHOFHOHHES enne Uy Newton Des i com - 8 Point source ! Spherical waveform eee Line Source: Cylindtical woueform cae ek cos . Source ak c+: Plane Paralle| waveform TOYS Hun gen's law. Every point on wovefront is Source for secondary wae front . = 7 IN R lows of reflection of Light > Two Vaws > CS Incident , Normal and Reflected rays Ue on same plane . Plane mirror: Tes a ss distance of object and image: W=y C oS Hoe Type + Image type is virbial, erect ee Spherical mirrors : Rocius of curvature ‘Rie Concave Mirror: £ = - Ajo Re \ t +R) Convex Mirror: f= + Ajo <-f Lo PoE Mirror Equation : beard Sencane. Comes. Magnification i Spherical mirrors; M=-Vi/u = bt/h, Tmoge type in cpherical mirrors: UW = negative always. Real: v o Enlarged: hi >he ikea hi Dm =(4-1)A SIN TAIZ Graph of Deviection ‘p' and angie*t’ Maximum Deviation? for Grazing incidence Dei or grazing emergence .—£'L= Fo* or ce =qGo" Dispersion through © Prism: Mred & Mviclet Dispersion angle: = Dy-Dy = (My -MryA [Dv > Dr] Angle of mean Deviation: Dm = Dut Dr = (Hutte -1) 4 Dispersive power of glass: P _ (Av- Lin) 4 Combination of Prisms: (Hetle _ 4) ombination Tisms* Achromatic Combination: Condition! $,= >, eNewtonDesk. come Net deviation: D = Dm, - Dmg Non- devioction of Direct = vision Combinatsn? condition. Dm, =Dm. Net angle of dispersion: gb = b,- b> trol: Refraction fold spherical Surfaces: s tcf a EB. Magnifiation: Len f VER (OR et: = _ oh siaenanstimames - Case, «] a rie Apporant Shift due to medium: x= + (1- Ho |p) XO + Shifted OW Oe from observer T. X20: Towards observer. Displacement of lens Method : Object - screen fixed ot'D. . Focal length of lens: £ = abinal ee LL = Shift of lens] 4D Combinations of lenses and mirrors: 3°¢-rnagso +E0ze sg) a ses f lenses with minor tks ge 2% ers a) ae ON OOXO : UML. Ratio of Maximum and Minimum Amplitude : fe = @ Fresnel's Biprism : — ' ‘ Pepa i. Fringe width: a i IL. Source distance 'd’: o = 2a(u-loc Serntd W. Deviation: & = (u-1)6 8 Tw. Interference’ Condition : eae aa ={ NA construchve ; st | 2nK constructive (Mt) A destructive (QNH)N Destructive @ Lloyd's Mirror Experiment : Newton Desk. come S Fringe width: uo = BA $ A Interference condition? jee Soa) Seen ees | nA destruchve D >| we (N=$)A_ constructive e NewtonDesk. com @ Diffraction from single sUt of 'b! width: | 6 NY MAMA! bsiNe ~ bE/py = NA b alee @ Resolution: sine = 122A/b @ Malus law: x = To tos2a <—p UI : ; mM ~~ ove? @ Motion of fluid drops under gravity & viscocity: @ ili ratio of electean: © = Ee es Newton Desk. Come T. Stoke's force. — = STN Ny T under qrauity : CRNA HSE TM. (Buoyant force by air on drop: B= A rs (d=4)¢- @ Photoelectric Effect : @ DeBroalie wavelength: I. | Photon's Energy: E=hv =he/A Azh/p I. Photen's Momentum: pahia = b/¢ TM. ;Maximurn K-E: of Ejected Photo- electron: Kmax = hv - >= eV, DL. Threshold frequency in’ PE ejection: Y= fh ve wt NX. Stopping Potential : Vo = he (+) -~$ gi? @ Effect on the current by: - ° -4,| “b/c YA T. Intensity: ( o¢ Intensity L ae € t TE. Potential’: as vt; it t Tr. Frequent: Lmaoc f* oA Wa Tit, freq t 5 Vo decreases Wa Wee V ve 0 ve He 4H FH A oO Ces OCHA HORE H Number of Photoelechons emitted! persecond: IA yx - efficiency of plate A: Area of plate AP 00 T : Intensity of light T= P/ume> Ri Plate- Source diistane Radiation Pressure: p= - a + : Perfectly” Absorbing sur face Perfect lect : 2) i erf y reflecting Surface : Prog = 22 Rutherford's Model (Geiger- Marsden): Impact Parameter eee aS Cot & = ie cot 2 © Newton Decl. come 0 eh Bosc 8 © Cos(O/2.) _ Minimunn distance: of Approach: "min = Sir Bohr'’s Atomic Model for one-electron species: Radius of Bohr eorbit: ry = _n2h? = 0.53 4x kK Me C72 : . ty. Mlle ie i Velocity inte nt Bohr Orbit > Vn = aske zs TP ms Energy inn: Bohroorbit’: En = “an ometiz’ = ~18.6 22 Mato gute 1. n Energy differenceia ni=ns orbits: AE = 2,1¢ x10 %72 i a) T es Sifebecccl. also, = Z(t, ni ) [a~atsal Binding Energy : BEn = - en = 13 6. ZF ev Lonisation Energy: Te, =-E, = 136 22 eV = 218KI0#22.5 No. of Spectral lines? 9.40%): No.of Lines = (92-4) Cnn) Atomic Line Spectrum : . ‘Lyman RSE Npe 1 TU. Balmer Series: n,= 2 Paschen Series n, = 3. W. Brackett-series: n, = 4 PfundSeriesS:: ny = 5 QA: NAV 5 Bs Nees, Quomization of Angatlor Momentum: t= nh Photon Energy in. state transition: _ - Emission of Photon: €,-€,= hv E2 hv hv Ep Absorption of Photon? Ag = hv g, [= oe = X-ray Spectrum + Amin = be cgapeer eee Moseley's law: We = a(Z-b) ke X-ray Diffraction: 2d sine = nA Heisenberg Uncertainty principle: Ap Ax > .b = —— oe, , W. No. of Nuclei decayed til y's W=No(I- © wr Probability of Survival’ of Nucleus » ees Ne Se a 2s = SUL Probability a Disintegration of Nuclei : Paes Ni ENE Re a VS at No Classi ficaHon on the. basis of Conductivi Metods /candiets ts’: Se ae io 2m 3 Semiconductors: P~ j9- Band gap in different materials: Metals : Ey = Ces EW ~ dev Cor @ ce Tv Ww. @ LT. 1. ® ty eNewtonDes k. come =At x Ps & ° fo a 4 pea a ee fa iy — TH 107-108 Sm! - 106 QM, GR Jo®= 1078 sm vs o) \ T ‘Uletors : i & (o's io! Epis vom ane ae 10" Sayenive mo overlapping bands } Semi-Condictors : Eq <3eV IL. Insulators: Eg > eV Intrinsic Semiconductors: Ne =Ny,= N; > T= Tetty AE T= OK 2 nj =05 T=0 5 Cinswhtor- Ukel Extrinsic Semiconductors : N- type semiconductors: Ne >> Ny, } eq wlibdum concentraton: @ De I. P-type Semiconoluctore: Ny >> Ne = Nye @ P-n janction Diode: py Ns ener HMA) pest I. forward Bigg: + ——Pt-—- : Limit T= Ts (exp (vel QVr) - 1) o OM 4 | ce y IL. Revetse Bias: --—}>}—-+ 5 Ne 4 Vr = Ket / rea 8 enn i. cen —— ee lh fas ie f f Slope = 1 TT. fotential barrier ak pn junct”: 8 : eG Vo= KT tose (3a Ne He Ne) : (Ha) . Number density of tntrinsic carriers : Ni = nye Pal2kT @ Electrical conductivity of Extrinsic se: T= " = (Ne Me +, Mh) @ Conductivity of Intrinsic semiconductor: or = en (Me +Mh) @ Mobility of electrons and holes: Hes, = etacn” @ Variation with temperature : 1. concentration! n= AT? € 5 ©3/2kT I. Mobility: WoST"™ (Ger merce ,2-5 : Si] ho= het \ H@ HOHE HHeHevv vv VV vv vH @ 6 P-n JuNCtion Diode as a Rectifier ? AC> De converter Half wave Rectifier : VY) = 40.6 Fo Kms outpur current Nolt: Trms user LeOd, 4 Vems= Ye be DC output currenct /Vatge:” WOT lesaek © Tass Tele MESS WV SV. Full wave Rectifier » Maximum Secondary voltage : Ne = {2 Vrms Me Rech fication Efficiency: n= 81.2 Jo ’ Rms Current 5 voltage output i Tems = 22 5 Vems De volues : Dde = 2Tof/q ; Nae = Veja ve Form factor of a Rectifier : £ = Lrms (iE de Hoth wave + f= 1.97 IL. Full wave: Fa 1M Special purpose p-n junction Diodes : Zener diode: Reverse bias; T,=f ~le 3 Vr OS ws 2B Digital Signal: € ca : 5 QntiT ant > OT PENtT/2 NewtonDesk. coms Antenna: Length: ; Hertz Ankenna: L2cA/2 TE Mareoni Antenna) C= 214. Effective Power Radioted by Antenna: pee (L)" Amplitude Modulation: m (4) = Am Sintomt a) Ac sinWwet Amplitude Modutation Index: prs Am | Ae . Mocluloted wave Equation: Cm (t) = (Act Am sinwnt) sinwet tu. Power of AM wave? Carrier: Po =. ae Total: Pe= & (1+) Wr. Current of AM wave: Ty = era & Frequency Modulation : CAG pe SHEE 5 Em (t)= Am sinwmt F#HeeHO ad He aun TD. WV. Modulation Index: mp = Smox _ +kAm [em = an] Sy Pea Vn aa. Modulated wove Equation: £(t)< fo Sin( wet + 6 Sinead) ‘ , “y v e Deviation in Frequency. $= V-Ve = kAm Sinwme. ° Max. Frequency: Vmox= Vet KAm “Max deviation? Sma= i KAm Band width: B = 200m 31 = No of sideband pairs. Demodulat'on of Amplitude Modulated wave : : Te