April 2015
Beginner
258 pages
5h 30m
English
Content preview from Learning Raspberry PiBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
Electronics components
Having understood the basic laws of electronics, this section introduces you to the basic electronics components that are used in most of the electronics circuits.
Resistors
A resistor is a passive two-terminal electrical component that resists the flow of electrons as a circuit element. The current through a resistor is in direct proportion to the voltage across the resistor's terminals. This relationship is represented by an alternative representation of Ohm's law, which yields the current I as the ratio of the potential difference V to the resistance R:
I= V/R
The symbol used for a resistor in a circuit diagram varies from standard to standard and one country to another:
In the real world, a typical axial lead carbon resistor ...