<P> Many electrical elements, such as diodes and batteries do not satisfy Ohm's law . These are called non-ohmic or non-linear, and their I--V curves are not straight lines through the origin . </P> <P> Resistance and conductance can still be defined for non-ohmic elements . However, unlike ohmic resistance, non-linear resistance is not constant but varies with the voltage or current through the device; i.e., its operating point . There are two types of resistance: </P> <Ul> <Li> Static resistance (also called chordal or DC resistance)--This corresponds to the usual definition of resistance; the voltage divided by the current </Li> </Ul> <Li> Static resistance (also called chordal or DC resistance)--This corresponds to the usual definition of resistance; the voltage divided by the current </Li>

Give a brief account of the factors on which the resistance of a conductor depends