SI Units

The SI unit of length is the meter (m). It is the base unit of length in the International System of Units (SI).

The SI unit of mass is the kilogram (kg). It is the base unit of mass in the International System of Units (SI).

The SI unit of time is the second (s). It is the base unit of time in the International System of Units (SI).

The SI unit of electric current is the ampere (A). It is the base unit of electric current in the International System of Units (SI).

The SI unit of temperature is the kelvin (K). It is the base unit of temperature in the International System of Units (SI).

The SI unit of luminous intensity is the candela (cd). It is the base unit of luminous intensity in the International System of Units (SI).

The SI unit of amount of substance is the mole (mol). It is the base unit of amount of substance in the International System of Units (SI).

The SI unit of frequency is the hertz (Hz). It represents one cycle per second.

The SI unit of force is the newton (N). It is defined as the force required to accelerate a one-kilogram mass by one meter per second squared.

The SI unit of pressure is the pascal (Pa). It is defined as one newton per square meter.

The SI unit of energy is the joule (J). It is defined as the work done by a force of one newton acting over a distance of one meter.

The SI unit of power is the watt (W). It is defined as one joule of energy per second.

The SI unit of electric charge is the coulomb (C). It represents the charge transported by a constant current of one ampere in one second.

The SI unit of electric resistance is the ohm (Ω). It is defined as the resistance between two points of a conductor when a constant potential difference of one volt applied to these points produces a current of one ampere in the conductor.

The SI unit of voltage is the volt (V). It is defined as the potential difference across a conductor when a current of one ampere dissipates one watt of power.

The SI unit of capacitance is the farad (F). It is defined as the capacitance of a capacitor with a potential difference of one volt when it is charged by one coulomb of electricity.

The SI unit of inductance is the henry (H). It is defined as the inductance of a closed circuit in which an electromotive force of one volt is produced when the electric current in the circuit varies uniformly at a rate of one ampere per second.

The SI unit of magnetic flux is the weber (Wb). It represents the magnetic flux that, linking a circuit of one turn, produces in it an electromotive force of one volt as it is reduced to zero at a uniform rate in one second.

The SI unit of magnetic field strength is the tesla (T). It is defined as one weber per square meter.

The SI unit of radioactivity is the becquerel (Bq). It is defined as the activity of a quantity of radioactive material in which one nucleus decays per second.