ALTERNATING CURRENT - TESLA'S greatest discovery

COMPLETE the text with the words provided in this WORD CLOUD. There are 2 extra words.

Alternating current (AC), is an _____________current in which the flow of electric ___________ periodically reverses direction, whereas in direct__________(DC, also dc), the flow of electric charge is only in one direction. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or ___________.

AC is the form in which electric _______________ is delivered to businesses and residences. The usual waveform of alternating current in most electric power ___________ is a sine wave. In certain applications, different waveforms are____________, such as triangular or ______________waves.

Audio and radio ____________  carried on electrical ___________are also examples of alternating current. These types of alternating current carry _____________  encoded (or modulated) onto the AC signal, such as _____________(audio) or images (video). These currents typically _________________at higher frequencies than those used in power _________________.