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What is the unit of electric current?
Ohm
Watt
Volt
Ampere
Ampere
Electric current is defined as the rate of flow of electric charge through a conductor. The SI unit for electric current is the Ampere (A), named after Andr├й-Marie Amp├иre.
SI Brochure: The International System of Units (SI) - BIPM
Electric current is defined as the rate of flow of electric charge through a conductor. The SI unit for electric current is the Ampere (A), named after Andr├й-Marie Amp├иre.
I=dtdQтАЛ тАФ Instantaneous current as the rate of change of charge over time
I=RVтАЛ тАФ Ohm's law for current calculation in a resistive circuit
The Ampere is formally defined as the constant current which, if maintained in two straight parallel conductors of infinite length and negligible circular cross-section placed 1 meter apart in a vacuum, would produce a force between them equal to 2├Ч10тИТ7 Newtons per meter of length. It represents the movement of one Coulomb of charge per second past a given point.
Current is a scalar quantity but is often depicted with a direction of flow (conventional current).
One Ampere corresponds to the flow of 6.242├Ч1018 electrons per second.
The Ampere is one of the seven SI base units.
Provides a standardized global reference for electrical measurement.
Enables precise calculation of power consumption in circuits.
Cannot be measured directly without creating a circuit path.
Very high currents can cause significant thermal damage (Joule heating).
Power transmission and distribution.
Electronics manufacturing and diagnostic testing.
Option A (Ohm) is the unit of resistance.
Option B (Watt) is the unit of power.
Option C (Volt) is the unit of electric potential difference.
D is correct тАФ The Ampere is the standard SI unit used to quantify the flow of electric charge.
Always remember that current (Ampere) is the flow of charge, while voltage (Volt) is the potential difference that drives that flow.
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