Voltage, Current, and Resistance
The state of an ideal resistor is completely specified by the voltage
across it (call it volts) and the current passing through
it (
amperes, or simply ``amps''). The ratio of voltage to
current gives the value of the resistor (
resistance in
Ohms). The fundamental relation between voltage and current in a
resistor is called
Ohm's Law:

The electrical power in watts dissipated by a resistor R is given by



Next Section:
Exercises
Previous Section:
Decibels