List of Physics Formulas - NEET preparation for 2020

Theses are Some Important Physics formulas
Expansion of solids;

Cast iron,type metal,lead,bismuth,silver glass,silver iodide,leather contract on heating.

Isotrophic   =ex;   All metals.

Anisotrophic = ex; Galena (pbs),Iceland spar.

Semiconductors = ex;Gallium,Arsenic,Germanic,silicon etc..

CO-EFFICIENT OF LINEAR EXPANSION ;[one dimensional]

FORMULAS;

L2 =L1[1+Alpha ∆t ]

L2-L1=Alpha L1 ∆t

Alpha =L1 ∆t\ ∆L

CO-EFFICIENT OF AREAL EXPANSION OR SUPERFICIAL EXPANSION;[two dimensional ]

FORMULAS;

A2 =A1[1+ ∆t ]

A2-A1=Beta A1 ∆t

Beta =A1 ∆t\∆A

CO-EFFICIENT OF VOLUMETRIC EXPANSION;[three dimensional]

FORMULAS;

V2 =v1[1+Gamma ∆t ]

V2-V1=Gamma V1 ∆t

Gamma = V1 ∆t\∆V

ISOTROPHIC BODY –UNIFORM EXPANSION IN ALL DIRECTIONS

Alpha X=AlphaY=Alpha Z=Alpha

Beta=2 alpha

Gamma=3 alpha

Ex; metals

ANISOTROPHIC BODY;

DIFFERENT EXPANSION IN DIFFERENT DIRECTIONS

# =Not equal

Alpha X # Alpha y # Alpha Z

Beta XYplane =alpha x+alpha y

Gamma = alpha x+alpha y+alpha z

Ex;Galena,Iceland spar

Germanium,silicon,gallium,arsenic.