Monitoring AC

Alternating current electricity is made by electrical generators.
The current and voltage change over time.

Circuit Theory

Looking at circuit theory. Finding the relationships between potential difference,  current and resistance.

Internal Resistance

All electrical sources can be considered a source of emf with an internal resistance. 

Capacitors

Capacitors are such an important component in electrical devices. They are used in many timing circuits and can block ac signals.

Semiconductors

Semiconductors and pn junctions are found in all electronic equipment.