Simplest Possible Circuit
The circuit elements are specified: the power supply or battery provides a stated emf
and is connected across a resistance R.
The emf of the battery is applied directly across the resistor;
i.e. the voltage provided by the battery is identical to the voltage difference
between points a and b.
Thus by applying Ohm's law to the single resistor, connected to a single emf:
Last updated Sept. 2, 1998.
Copyright George Watson, Univ. of Delaware, 1998.