Video encyclopedia

Alternating current


Alternating Current Fundamentals PREVIEW


Alternating and Direct Current | Electricity | Physics | FuseSchool


Circuit Basics: What's the difference between AC and DC power?


GCSE Physics - Alternating (AC) and Direct Current (DC) #20


How AC Current Flows Animation.

Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction. Alternating current is the form in which electric power is delivered to businesses and residences, and it is the form of electrical energy that consumers typically use when they plug kitchen appliances, televisions, fans and electric lamps into a wall socket. A common source of DC power is a battery cell in a flashlight. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.
    • Transmission, distribution, and domestic power supply 

    • AC power supply frequencies 

    • Effects at high frequencies 

    • Techniques for reducing AC resistance 

    • Techniques for reducing radiation loss 

    • Twisted pairs 

    • Coaxial cables 

    • Mathematics of AC voltages 

    • Information transmission 

    • History