Linked from
The 87 pages that link to Electric charge, each with the reason it gives.
ElectronRelated: An electron carries the smallest free negative charge observed.
Electromagnetic fieldRelated: Charge is the source of electric fields in Maxwell's equations.
IonizationRelated: Electron gain or loss changes an atom's net charge while conserving total charge.
W and Z bosonsRelated: W bosons carry electric charge; Z bosons carry none.
VoltRelated: The coulomb in the volt's joule-per-coulomb definition measures charge.
RC circuitRelated: A capacitor’s changing stored charge drives the circuit’s transient current.
Bottom quarkRelated: The bottom quark’s charge is −⅓ in units of the proton’s charge.
Up quarkRelated: The up quark’s charge is +⅔ of the elementary charge.
Down quarkRelated: Its fractional charge helps distinguish the down quark from the up quark.
Ion beamRelated: An ion's charge enables fields to accelerate and steer it.
Electromagnetic field calculationsRelated: Charge density is a source term for electric fields.