ABSTRACT
This chapter explains the conditions under which Ohm's Law applies and discusses whether or not Ohm's 'Law' should be considered as being a true scientific 'law'. One of the conditions necessary for Ohm's Law to apply is that the temperature of the conductor must remain constant during the experiment. Ohm's experiments are very simple by today' standards, and they can be performed with great accuracy in any school or college laboratory using readily available equipment. The chapter explores the difference between 'linear' and 'non-linear' materials and circuit components. Fixed-value resistors, which are circuit components used to modify the natural resistance of a circuit, must be manufactured from 'linear' conductors of course, because it is important that their specified values of resistance remain constant for voltage/current variations within their power ratings.
