<P> The ohm ( symbol : Ω ) is the SI derived unit of electrical resistance , named after German physicist Georg Simon Ohm . Although several empirically derived standard units for expressing electrical resistance were developed in connection with early telegraphy practice , the British Association for the Advancement of Science proposed a unit derived from existing units of mass , length and time and of a convenient size for practical work as early as 1861 . The definition of the ohm was revised several times . Today , the definition of the ohm is expressed from the quantum Hall effect . </P>
<P> The ohm ( symbol : Ω ) is the SI derived unit of electrical resistance , named after German physicist Georg Simon Ohm . Although several empirically derived standard units for expressing electrical resistance were developed in connection with early telegraphy practice , the British Association for the Advancement of Science proposed a unit derived from existing units of mass , length and time and of a convenient size for practical work as early as 1861 . The definition of the ohm was revised several times . Today , the definition of the ohm is expressed from the quantum Hall effect . </P>
an ohm is the unit of measurement for
an ohm is the unit of measurement for
electrical resistance
electrical resistance