Electrostatics

The branch of physics that studies electric charges at rest and the forces and fields associated with them.

Like charges repel each other, while opposite charges attract.

The unit of electric charge in the International System of Units (SI), defined as the amount of charge transported by a constant current of one ampere in one second.

A region around a charged particle where a force would be exerted on other charged particles.

The direction of the electric field is defined as the direction of the force that would act on a positive test charge placed in the field.

Electric field strength decreases with increasing distance from the charge.

F = k * |q1 * q2| / r^2, where F is the force, k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between the charges.

Electric field lines visually represent the strength and direction of an electric field; the density of lines indicates the strength of the field.

They radiate outward from the charge.

They converge inward toward the charge.