- farad [F]
- The farad is the SI unit of the capacitance of an electrical
system, that is, its capacity to store electricity. It is a rather
large unit as defined and is more often used as a microfarad. It
is named after the English chemist and physicist Michael Faraday
(1791-1867).
- hertz [Hz]
- The hertz is the SI unit of the frequency of a periodic
phenomenon. One hertz indicates that 1 cycle of the phenomenon
occurs every second. For most work much higher frequencies
are needed such as the kilohertz [kHz] and megahertz [MHz]. It is
named after the German physicist Heinrich Rudolph Hertz (1857-94).
- joule [J]
- The joule is the SI unit of work or energy. One joule is the
amount of work done when an applied force of 1 newton moves
through a distance of 1 metre in the direction of the force.It
is named after the English physicist James Prescott Joule (1818-89).
- newton [N]
- The newton is the SI unit of force. One newton is the force
required to give a mass of 1 kilogram an acceleration of
1 metre per second per second. It is named
after the English mathematician and physicist Sir Isaac Newton
(1642-1727).
- ohm [
 ]
- The ohm is the SI unit of resistance of an electrical
conductor.
Its symbol, is the capital Greek letter 'omega'. It is named
after the German physicist Georg Simon Ohm (1789-1854).
- pascal [Pa]
- The pascal is the SI unit of pressure. One pascal is the pressure
generated by a force of 1 newton acting on an area of 1
square metre. It is a rather small unit as defined and is
more often used as a kilopascal [kPa]. It is named after the
French mathematician, physicist and philosopher Blaise Pascal
(1623-62).
- volt [V]
- The volt is the SI unit of electric potential. One volt is the
difference of potential between two points of an electical conductor
when a current of 1 ampere flowing between those points
dissipates a power of 1 watt. It is named after the
Italian physicist Count Alessandro Giuseppe Anastasio Volta
(1745-1827).
- watt [W]
- The watt is used to measure power or the rate of doing work. One
watt is a power of 1 joule per second. It is
named after the Scottish engineer James Watt (1736-1819).
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