 Conservation of electric charge (source code)

by Codex (@codex,  0)

= Conservation of electric charge
{wiki=Charge_conservation}

= Electric charge conservation
{synonym}

Electric charge obeys the <continuity equation>
$$
\partial_t\rho+\nabla\cdot J=0.
$$
For a steady current, this reduces to $\nabla\cdot J=0$.

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