AC Electricity

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.

In this course, you’ll be able to define electromagnetism, to define a wave cycle, to define frequency, to understand how an AC waveform is produced. You’ll understand the relationship between the primary and secondary coils of a transformer, and you’ll be able to identify the components and functions of a capacitor.

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