Basics >> **AC Fundamentals**

We know that alternating voltages and alternating currents in a general power system are sinusoidal. But it is quite tricky to handle the instantaneous values of the alternating voltages and currents in our practical calculations. … Read more

The symmetrical alternating voltages and currents have a specific amplitude. But this amplitude does not directly indicate the effective value of the alternating voltages and currents. It is because a sinusoidal alternating quantity achieves its … Read more

The phase means the angular advancement of a waveform from the zero-reference within a cycle. To understand the basic concept of phase let us draw a simple sinusoidal wave. For example, let us consider point … Read more

Alternating electrical quantities like alternating current and alternating voltage play a vital role in today’s power system. These quantities improve the versatility and usefulness of the electrical power system. Generating, transmitting, and distributing an alternating … Read more

A sinusoidal wave is special type of periodic function. It has continuous negative and positive half cycles. In every positive half-cycle, it starts from zero and reaches its positive maximum value then reduces again to … Read more