Electric current
An electric current is a flow of charged particles, such as electrons or ions, through an electrical conductor or space.
At a glance
Key signals
10% cross fields · reaches 3 more
- Physics
- Electromagnetism
- Electrical Engineering
- Explanation
- Examples
- Misconception
- Sourced relations 10
- Attribution
Dependencies
What this concept builds on and what it makes possible — derived from the atlas’s dependency, causal and structural relations, not from every related edge.
Foundations · builds on
Electrical conductorenablesElectric currentEstablished
electrical conductor enables electric current.
Mechanism: A conductor enables current: its loosely held electrons are free to drift, so charge can flow through it easily.
- University Physics (OpenStax) verifiedmoderate evidence
Electromagnetic inductioncausesElectric currentEstablished
Open Electromagnetic induction →
Electromagnetic induction causes electric current.
Mechanism: A changing magnetic field induces a voltage and current in a nearby conductor — the basis of generators.
- University Physics (OpenStax) verifiedmoderate evidence
VoltagecausesElectric currentEstablished
voltage causes electric current.
Mechanism: Voltage drives current: a difference in electric potential pushes free charges through a conductor, just as a height difference makes water flow.
- University Physics (OpenStax) verifiedmoderate evidence
Enables · leads to
Electrochemistrydepends onElectric currentEstablished
electrochemistry depends on electric current.
Mechanism: Electrochemistry links chemistry and electricity: redox reactions drive an electric current (batteries) or are driven by one (electrolysis).
- Chemistry 2e (OpenStax) (2019) verifiedmoderate evidence
Electric currentcausesMagnetic fieldEstablished
electric current causes magnetic field.
Mechanism: A moving electric charge — a current — produces a magnetic field around it.
- University Physics (OpenStax) verifiedmoderate evidence
System context
Electric currentis part ofElectrical circuitEstablished
electric current is part of electrical circuit.
Mechanism: Electric current is the flow that a circuit carries: charge travelling around the closed loop from source through the components and back.
- University Physics (OpenStax) verifiedmoderate evidence
Alternating currentis aElectric currentEstablished
alternating current is a kind of electric current.
Mechanism: Alternating current is electric current that reverses direction many times a second — the form delivered by the power grid.
- Wikidata verifiedmoderate evidence
Direct currentis aElectric currentEstablished
direct current is a kind of electric current.
Mechanism: Direct current is electric current that flows steadily in one direction, as from a battery.
- Wikidata verifiedmoderate evidence
Structural role & consequence
Interpreted from the current atlas graph — what the connections mean, not just how many there are.
Directly enables 1 concept; following enables/causes relations, 1 concept is downstream across 2 disciplines.
structural · Follows only enables/causes dependency edges — not general relatedness.
Currently dark in the atlas: no key date stored · 10 of 10 of its relations lack claim-level evidence.
atlas representation · Describes the current Thinking OS representation, not the state of the world.
Builds on 3 foundations (requires / depends-on / derived-from / emerges-from).
structural · Structural graph analysis — not a claim of importance, causation or history.
Structural neighbourhood: 10 → 25 → 66 concepts reachable within 3 hops.
structural · Structural reach — being reachable is not the same as being understood.
cross-field
9 within-field, 1 cross-field
Strengths & constraints
Constraints
- Evidence coverage currently thin in the atlas — few of its relationships carry claim-level evidence. atlas representation
- No dated history stored — the atlas records no key date for this concept. atlas representation
Conditions
- Its dependency reading rests on 3 foundation relations. structural
- Read structurally — most of its relationships carry no external evidence yet, so claims here are graph-derived. structural
Dependency radial
What this concept builds on (left) and what it makes possible (right) — derived from dependency and causal relations.
What builds on this
1 concept build on this directly, 1 in total, across 2 disciplines.
Structural downstream reach along dependency edges — not a claim of historical necessity.
Seen through each discipline
How this concept sits in each of its fields — derived from its real connections in the graph, not asserted.
Through this lens it connects to Magnetic field, Electrical circuit, Ohm's law and Electrical conductor.
Through this lens it connects to Magnetic field, Ohm's law, Electrical conductor and Electromagnetic induction.
Through this lens it connects to Electrical circuit, Ohm's law, Voltage and Alternating current.
Formula
Source: Wikidata
Check yourself
A quick check against a common misconception. Nothing is scored — picking the tempting-but-wrong answer just flags an idea worth revisiting.
Which statement is correct?
Current gets used up as it goes round a circuit, so less comes back to the battery.
Charge is conserved: the current leaving a bulb equals the current entering it. What the bulb uses is energy, not current.
Look for: Learner predicts the current is smaller after the bulb than before it.
Related ideas to explore
Concepts that look related but are not yet connected here — candidates for a connection to reason about, not established links.
This idea also appears in…
The same structure shows up in other disciplines. These are real recurrences drawn from the graph — a starting point for asking “what carries over, and what changes?”
Stocks and flows40 disciplines · 35 concepts
Concepts
shares a mental model
shares a mental model
shares a mental model
shares a mental model
shares a mental model
shares a mental model
An electric current is a flow of charge — usually electrons — through a wire, like water flowing through a pipe. A voltage pushes the current, and a bulb or motor uses its energy along the way.
Current is the rate of flow of charge, I = Q/t, measured in amperes. In a series circuit it is the same everywhere; Ohm's law (V = IR) ties it to voltage and resistance. Energy, not charge, is what gets used up by components.
Mental models at work here
- Connects 10 other ideas across 3 disciplines.
- A cross-disciplinary bridge — its connections reach into 3 other fields.
- Most of its connections are of the “Cause & effect” kind.
- It exercises 1 reusable thinking pattern.
Derived from the graph’s real structure — observations, not a score.
Sources
- Wikipedia (English & German editions) verifiedmoderate evidence
- Wikidata verifiedmoderate evidence
- University Physics (OpenStax) verifiedmoderate evidence