resistivity is the resistance of unit specimen. resistance means the whole resistance offered by the conductor . resistivity depends only on temperature but not on shape and size of the conductor .(...
An OHM is the term for electrical resistance. An example is your bar type radiator heater. The resistance in the windings (these are usually of small diameter wire) causes the electrons to flow...
Electrical resistance is given by the formula
where
: ℓ is the length (in units of meters)
: A is the cross sectional area (in units of m2), and
: ρ is the resistivity (in units of Ω·m) of...
When an electric current moves through a conductor, there is always some electrical resistance to the current. This is because of the attraction of the electrons to the positive nuclei of the atoms...