AC Circuits RLC Circuits
Purely Resistive Circuit There is no capacitance as well as inductance available in a purely resistive circuit. If a current starts flowing through a purely resistive circuit there will be no back EMF generated in …
AC Fundamentals
AC Fundamentals (Alternating Current)
The current that changes its direction of flow with a certain frequency is called an alternating current. This is the reason, an alternating current circuit does not have any positive or negative terminal. This is …
Representation of Alternating Current and Alternating Voltage
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. …
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RMS Value or Root Mean Square Value of Voltages and Currents
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 …
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Phase and Phase Difference of Currents and Voltages
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 …
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Alternating Current and Alternating Voltage
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 …
What is Sinusoidal Wave?
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 …