Basic principles in electrical engineering.
The SI units. The system of units used in engineering is the International Sistem of units. (SI)
It was introduced in
1960 was adopted by the majority of countries.
as the official system of measurement.
The basic SI units are:
The metre
The kilogram
The second
The ampere
kelvin
candela
and mole
These are a measure for:
length, mass, time, electric current, thermodynamic temperature,
luminous intensity and ammount of substance.
Basic electrical quantities are:
First of all, charge,
or quantity of electricity.
The unit of charge is the coulomb (C).
One Coulomb is one ampere second.
That means Q equals I times t.
Secondly, electrical potential.
The unit of electrical potential is the volt (V).
One volt is defined as the difference in potential between 2 points in a conductor
when carrying a current of 1 ampere
dissipates the power of 1 watt.
Join us next time!
