List of Physics Formula chapter 1 can study by students of class 12. These definitiona and formulas of Class 12 Physics Chapter 1: Electric Charges and Fields is developed and witten by our expert teachers. Physics formulas. List of Physics Formula is prepapred and collected from varius resources to help the students.
Physics Formula - 1
Apply Coulomb’s law
q1 = first charge
q2 = Second charge
r = distance between both charge
ε0= permittivity of free space
1/4πε0 = 9 x 109 Nm2C-2
Physics Formula - 2
Coulomb’s force law between two point charges q1 and q2 located at r1 and r2 is then expressed as
Physics Formula - 3
Thus the total force F1 on q1 due to the two charges q2 and q3 is given as
Physics Formula - 4
Resultant force
Physics Formula - 5
The electric field produced by the charge Q at a point r is given as
Physics Formula - 6
Force F exerted by a charge Q on a charge q
Physics Formula - 7
The electric field E at r due to the system of charges is
Physics Formula - 8
The total flux φ through a surface S is
φ ≈ Σ E.ΔS
Physics Formula - 9
the electric field of a dipole at large distances takes simple forms:
At a point on the dipole axis
At a point on the equatorial plane
Physics Formula - 10
Surface charge density σ at the area element by
Physics Formula - 1 1
The linear charge density of a wire is defined by
Physics Formula - 1 2
The volume charge density (sometimes simply called charge density) is defined as
Physics Formula - 1 3
Electric field due to the charge ρΔV is given by Coulomb’s law:
Physics Formula - 1 4
The total electric field due to the charge distribution is obtained by summing over electric fields due to different volume elements:
Physics Formula - 1 5
Total flux through a sphere of radius r, which encloses a point charge q at its centre.
Physics Formula - 1 6
Electric flux through a closed surface S
∆ φ1 = q/ε0
Physics Formula - 1 7
Flux through the Gaussian surface
Physics Formula - 1 8
Field due to a uniformly charged infinite plane sheet
n is a unit vector normal to the plane and going away from it
Physics Formula - 1 9
Field outside the shell
E=0
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