Why does current flow the opposite way from the electrons?

Historical origin & sign convention

• Early experimenters defined “positive” and “negative” before electrons were known, based only on how rubbed materials behaved.
• The labeling was purely conventional; reversing all signs would leave Maxwell’s equations and circuit laws unchanged.
• Later discovery that electrons carry charge opposite to the defined current direction created a mismatch, but standards were already deeply embedded, so they were not changed.
• The thread notes that the time between Franklin’s work and atomic/molecular theory is very short on geological/biological timescales, illustrating how recent our understanding is.

Current vs electron flow and charge carriers

• Conventional current is defined as flow of positive charge; in normal metals the actual mobile carriers are electrons moving the opposite way.
• In semiconductors, “holes” (absence of electrons) behave as positive charge carriers, so thinking in terms of hole flow is often more convenient.
• Charge carriers need not be electrons (e.g., ions in electrolytes), reinforcing that “current” is a macroscopic abstraction.

Terminology confusion (anode, cathode, etc.)

• Many comments describe difficulty remembering anode/cathode, especially because which terminal is which can flip when a device is charging vs discharging.
• Various mnemonics are shared; some argue the terms are so context‑dependent they’re almost useless outside vacuum tubes, diodes, and electrochemistry.
• There is also confusion between cations/anions and anodes/cathodes.

Fields, energy flow, and what actually moves

• Several comments stress that electrons drift very slowly; the “signal” and energy propagate via electromagnetic fields at near‑light speeds.
• Energy in circuits largely travels in the fields around conductors, with wires acting as guides; electrons mainly respond to the fields.
• Linked popular videos on this are described as insightful by some and misleading or “debunked” by others; critics emphasize that electrons do flow in wires and that “current through air” is negligible except during breakdown.

Grounding, safety, and practical circuits

• In power systems, what matters for safety is which conductor is tied to earth; touching one isolated conductor is harmless, touching one referenced to ground can shock you.
• Grounding the system helps control voltages relative to earth and mitigate lightning/atmospheric charge issues.
• Battery examples (AA vs 9V, licking terminals) are used to illustrate the need for a complete path and sufficient voltage.

Mathematical and philosophical aspects

• Some argue “electron is negative” is sloppy shorthand and that only its charge is negative in a chosen numerical model; others counter that this shorthand is standard and clear in context.
• Extended debate touches on whether numbers and negation are features of the world or purely mental constructs, and whether math is invented or discovered.
• Commenters note the symmetry of flipping all charges and directions, and that many EM expressions depend only on products of charges, making the sign convention physically arbitrary.

Gravity and other analogies

• An analogy is drawn to a hypothetical future reinterpretation of gravity (push vs pull), arguing that some sign choices in physics may be conventional.
• Others point out that “push gravity” models have been tried historically and run into hard quantitative contradictions (drag, shielding, equivalence of inertial and gravitational mass).

Naming, language, and pedagogy

• Discussion digresses into how labels like “up/down” quarks, left/right politics, battery/accumulator, and color names (red/blue, pink/red, orange/brown) illustrate arbitrary but sticky conventions.
• Some regions and textbooks reportedly teach electron‑flow (negative‑to‑positive) conventions instead of conventional current, which can confuse students when they encounter mainstream notation.