Electricity & Magnetism

Electric Current

I = \frac{dQ}{dt}

Current is rate of charge flow.

Variables

I

Current

Electric current

A

dQ

Charge

Charge passing

In SI units: A·s

C

dt

Time

Time interval

s

Derivation

Definition of electric current.

Your notes

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Other electricity & magnetism formulas with the same quantities

Electric Power (Electric Circuits) shares Current
Magnetic Force on Wire (Magnetism) shares Current
Biot-Savart Law (Magnetism) shares Current
Magnetic Field (Long Wire) (Magnetism) shares Current
Magnetic Field (Solenoid) (Magnetism) shares Current
Inductor Energy (Electromagnetic Induction) shares Current

Where this formula is listed

Electricity & Magnetism formulas, under Electric Circuits, alongside Resistance, Resistors in Series, Resistors in Parallel, Kirchhoff's Voltage Law and Kirchhoff's Current Law.
In the electricity & magnetism list it comes after Electric Power and before Resistance.
Electricity & Magnetism formula sheet, one of 48 formulas printed with symbol keys and SI units.
The full formula index, grouped by category and topic.

Common questions

What is the Electric Current formula?

Electric Current is written I = dQ/dt. Current is rate of charge flow. It belongs to Electricity & Magnetism, under Electric Circuits.

What are the units in I = dQ/dt?

In SI units, I is current, measured in A; dQ is charge, measured in A·s; dt is time, measured in s.

How is the Electric Current formula derived?

Definition of electric current. The result is I = dQ/dt.