So d^ is a unit vector, right?Babadag said:
The formula for calculating electric field intensity due to a point charge is E = kQ/r^2, where E is the electric field intensity, k is the Coulomb's constant, Q is the charge of the point charge, and r is the distance from the point charge.
The formula for calculating electric field intensity due to a line charge is E = (kλ)/r, where E is the electric field intensity, k is the Coulomb's constant, λ is the linear charge density, and r is the distance from the line charge.
The electric field intensity at a point on the perpendicular bisector of a line charge is zero. This is because the electric field vectors from opposite sides of the line charge cancel each other out at this point.
The electric field intensity is inversely proportional to the square of the distance from the point charge. This means that as the distance increases, the electric field intensity decreases.
The formula for calculating electric field intensity due to a charged plane is E = (σ)/(2ε0), where E is the electric field intensity, σ is the surface charge density, and ε0 is the permittivity of free space.