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The antimuon is the antiparticle of the muon. It has electric charge $+1$ and lepton number $-1$.

The black-hole no-hair principle says that radiation carries away the higher multipole structure of a collapsing isolated body, leaving a stationary black hole specified by conserved asymptotic charges such as mass, angular momentum, and electric charge.

A system is charge neutral when its total positive and negative electric charge cancel.

In a homogeneous Ohmic conductor, the charge continuity equation and Gauss's law imply exponential decay of the bulk charge density, $\rho (t)=\rho (0)e^{-\sigma t/ϵ}$. For an isolated finite body, bulk charge moves to its boundary; the accumulating surface charge density preserves total electric charge. The formula uses a constant permittivity $ϵ$ and the corresponding free-charge convention, or ${ϵ}_0$ for total charge in the vacuum form of Gauss's law.

The antiparticle of the down quark has electric charge $+1/3$ and baryon number $-1/3$.

Chemical systems whose reactions, transport or equilibrium couple to electric charges and electric potential. An electrolyte carries mobile ions; a Poisson-Boltzmann equation can approximate their equilibrium distributions.

A medium with mobile ions capable of carrying electric charge. Dissolved salts typically supply both positive and negative species; a counterion-only model keeps only the mobile species required to oppose a fixed charge. Poisson-Boltzmann equations use ideal Boltzmann distributions for those species.

For the light quark flavors, electric charge is $Q=I_3+Y/2$, with flavor hypercharge $Y=B+S$. On $(u,d,s)$ it gives $(2/3,-1/3,-1/3)$, and additivity extends it to the baryon octet and meson octet.

A chemical atom or molecular entity with nonzero net electric charge. An ion opposing a fixed charge is called a counterion.

The ${\Lambda }^0$ in the baryon octet is an isospin singlet with strangeness $-1$ and zero electric charge. Its ordinary valence quark content is $uds$.

A lepton is a Standard Model fermion without color charge. The charged leptons have electric charge $-1$ and their corresponding neutrinos have charge zero. There are three generations; their antiparticles carry opposite electric charge and lepton number. Charged leptons and neutrinos have lepton number $+1$, with the corresponding antiparticles carrying $-1$.

Scattering with one meson and one baryon in the initial and final states. The strong interaction conserves electric charge, baryon number, net strangeness, four-momentum, total angular momentum, and parity. Approximate isospin symmetry imposes additional relations among charge-channel amplitudes.

The muon is the negatively charged second-generation lepton, with electric charge $-1$ and lepton number $+1$. Its antiparticle is the antimuon.

For the global phase symmetry of a complex scalar field oriented as $\delta \psi =-i\epsilon \psi$, the Noether current is $j^{\mu }=i({\psi }^{\ast }{\partial }^{\mu }\psi -\psi {\partial }^{\mu }{\psi }^{\ast })$. The Euler-Lagrange field equations $\square \psi +V^{\prime }(|\psi {|}^2)\psi =0$ and its complex conjugate give ${\partial }_{\mu }{j}^{\mu }=i({\psi }^{\ast }\square \psi -\psi \square {\psi }^{\ast })=0$ for a real differentiable potential. Integrating $j^0$ gives $Q$ when boundary flux vanishes. A charged scalar coupled to electromagnetism has electric charge $qQ$ with the chosen charge normalization; without that physical identification it is an internal charge.