Electric Fields and Forces in Physics

Electrostatic Force

Force between two point charges based on distance.

Electric Field

Force per unit charge at a point in space.

Electric Field Strength

Magnitude of electric field measured in N/C.

Coulomb's Law

Describes the electrostatic force between charges.

Electric Field Lines

Visual representation of electric field direction and strength.

Charge Density

Charge per unit area or volume.

Uniform Electric Field

Electric field strength is constant in a region.

Vector Sum

Total force calculated by adding individual forces.

Test Charge

Small charge used to measure electric field.

Electric Field of Point Charge

Field created by a single point charge.

Electric Field Inside Conductor

Zero electric field within a conductor at equilibrium.

Electric Field Outside Conductor

Perpendicular to the surface of a conductor.

Electric Field of Charged Ring

Field calculated using differential charge elements.

Electric Field of Charged Disk

Field derived from concentric rings of charge.

Electric Field Superposition

Total field from multiple sources is vector sum.

Magnitude of Electric Field

Strength determined by line density of field lines.

Direction of Electric Field

Given by the direction of force on positive charge.

Electric Field of Parallel Plates

Field between plates is uniform and directed.

Electric Field Strength Formula

E = F/q, where F is force and q is charge.

SI Unit of Electric Field

Measured in newtons per coulomb (N/C).

Electric Field and Charge Relationship

Field strength is proportional to charge magnitude.

Electric Field Lines Properties

Lines begin on positive charges and end on negatives.

Electric Field Shielding

Conductors block external electric fields inside.

Electric Field Directionality

Field direction is tangential to field lines.

Electric Field at Infinity

Field lines appear radial from net charge.

Induced Charge

Charge redistribution on conductor due to external field.

Electric Field Calculation

Use integration for continuous charge distributions.

Force on Test Charge

Force experienced by charge in electric field.

Electric Field of Long Wire

Field strength calculated at a distance from wire.

Electric Field of Charged Rod

Field determined by charge distribution along rod.

Electric Field of Infinite Sheet

Field strength is constant and independent of distance.

Electric Field of Two Plates

Field vector calculated from surface charge densities.

Electric Field Strength Formula for Disk

E = (σ/2ε₀) for infinite charged sheet.

Electric Field Direction from Charge

Away from positive, towards negative charges.

Electric field due to FOrce

Electric field and force of gravity

Electric field due to point charge

Linear density

Electric field due to charge ring

Arc length

Point charge due to electric field

Motion electric field

Also remember F = ma if needing gravity

Surface charge density

measured c/m²

Volume charge densitity

Electric field due to uniform sheet of charge

Electric field due to line of charge

Electric field along axis of ring of charge

Electric field due to uniform disk of charge