Linear Momentum FormulaThe formula for linear momentum are as stated below 

Description 
Formula 

Linear Momentum 
p=mv p is linear momentum, m is mass and v is velocity 

Conservation of momentum 
m_{1}u_{1}+m_{2}u_{2}=m_{1}v_{1}+m_{2}v_{2} Where P = Momentum, m = Mass and u,v= velocity 

Elastic Collision 
m_{1}v_{1i}+m_{2}v_{2i}=m_{1}v_{1f}+m_{2}v_{2f} Where i = initial and f = final 

Inelastic collision 
m_{1}v_{1i}+m_{2}v_{2i}=(m_{1}+m_{2)}v_{2f} 

Force (from Newton’s second law) 
F=m×a F_{net}=dp/dt 

Momentum in terms of kinetic energy 
p=mv p^{2}=m^{2}v^{2} p^{2}=2m(1/2mv^{2}) p^{2}=2mK Here, K = kinetic energy 

Dimensional Formula of Momentum 
[M^{1}L^{1}T^{1}] 

Geometrical Optics FormulaThe formula for geometrical optics are as stated below 

Description 
Formula 

Laws of Reflection of light 
The incident ray, refracted ray, and normal always lie on the same plane. Snell’s law According to the Snell’s law sin i/sin r = constant Here, i = angle of incidence r = angle of reflection 

Relative refractive index 
The Relative refractive index is given as n= c/v here, n = refractive index c = speed of light in vacuum v = speed of light in medium 

Lateral Shift 
Lateral Shift is given as lateral shift = t.sin (ir)/cos r 

Normal shift on a single surface 
The normal shift on a single surface is given as Normal shift = t.(11/n) 

Relation between refractive index and critical angle 
The relation between refractive index and critical angle is given as n = 1/sin c 

Refraction through a prism 
The refractive index of a prism is given as n\ =\ \frac{sin\left(a+\frac{\delta}{2}\right)}{sin\ \frac{A}{2}} 

Lens maker formula for thin lenses 
Lens maker formula for thin lenses is given as 1/f=(n1)[1/R_{1}–1/R_{2}] 

Power of lens 
Power of lens is given as P=1/f 

Equivalent focal length of combination of two thin lenses 
1/f=1/f_{1}+1/f_{2} 

Heat And Thermodynamics FormulaThe formula for heat and thermodynamics are as stated below 

Description 
Formulas 

Kirchhoff’s Law 
Emissive power of body/Absorptive power of body= Emissive power of black body 

Conduction 
Rate of flow of heat in conduction is determined as dQ/dt=KA.dT/dx


Newton’s law of cooling 
dθ/dt =(θθ_{0})


Temperature scales 
F=32+9/5×C K = C +273.16


Ideal Gas equation 
PV= nRT


Van der Waals equation 
(p+a(n/V)^{2})(Vnb) = nRT


Thermal expansion 
Linear Expansion L= L_{0}(1+α∆T) Area Expansion A= A_{0}(1+β∆T) Volume Expansion V= V(1+γ∆T) 

Relation between α, β and γ for the isotropic solid 
α/1=β/2=γ/3 

Stefan Boltzmann’s law 
u = σAT^{4} (Perfect black body) u = eσAT^{4} (Not a perfect black body)


Thermal resistance to conduction 
Thermal resistance is given as R=L/KA


Hooke’s Law FormulaThe formula for Hooke’s law are as stated below 

Description 
Formula 

Formula for Hooke’s Law 
F=kx Where F = force, k = constant and x = displacement Note: Hooke’s law can be expressed in the form of stress and strain. 

According to Hooke’s law 
Stress ∝ Strain That is, Stress =K×Strain Where K is the proportionality constant 

Formula for Stress 
Stress (σ)=F/A Where, F is the restoring force, and A is the crosssection area 

Formula for Strain 
Strain (ε) =ΔL/L Where, ΔL= Change in length and L = original length 

SI unit of Stress 
N/m^{2} 

Young’s Modulus (Y) 
Y=Tensile stressTensile Strain Y=F_{l}/A÷∆l/l 

Shear Modulus 
Y=Shearing stressShearing Strain Y=F_{l}/A÷∆x/h 

Inductance FormulaThe formula for inductance are as stated below 

Description 
Formula 

Inductance 
𝐿=𝜇N^{2}𝐴/𝑙 Where 𝐿 – inductance in Henry(H) 𝜇 – permeability (Wb/A.m) 𝑁 – number of turns in the coil 𝐴 – area encircled by the coil 𝑙 length of coil(m) 

Induced voltage in a coil (V) 
The voltage induced in a coil (V) with an inductance of L is given by 𝑉=𝐿 𝑑𝑖/𝑑𝑡 Where, 𝑉 = voltage(volts) 𝐿 – inductance value(H) 𝑖 the current is(A) 𝑡 time taken (s) 

Reactance of inductance 
The reactance of inductance is given by: 𝑋=2𝜋𝑓𝐿 Where, Reactance is 𝑋 in ohm The frequency if 𝑓 in Hz Inductance is 𝐿 in Henry(H) 

Magnetic Flux 
The magnetic flux through a plane of area dA placed in a uniform magnetic field B is given as
When the surface is closed, then magnetic flux will be zero. This is due to magnetic lines of force are closed lines and free magnetic poles is not exist 

Induced Current 
Induced Current is given as I=E/R = N/R(dϕ/dt)= N/R(ϕ_{1}– ϕ_{2}) 

Mutual – Induction 
Mutual – Induction is given as e_{2}=d(N_{2}ϕ_{2}/dt = M.dl_{1}/dt Therefore, M=μ_{0}N_{1}N_{2}A/l 
JEE Physics Important Formulas Part 5
In this article we will go through physics quick formula revision for Jee mains. The formulas of Physics that are important for Jee mains and advance. The formula stated in the article is also a physics revision formula for Jee and revision formula for jee advanced.