The power that was actually used by the load i e.
Ac power supply graph.
Power delivered from an ac source is known as ac power and power delivered from dc sources are known as dc power.
In our tutorial about the ac waveform we looked briefly at the rms voltage value of a sinusoidal waveform and said that this rms value gives the same heating effect as an equivalent dc power and in this tutorial we will expand on this theory a little more by looking at rms voltages and currents in more detail.
P avg vi cosφ.
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.
Ac supply main variations the maximum variations in ac supply mains is give or take 6 of its rated value.
The graph above shows the current waveform varying as a sine wave with the current first moving in one direction and then the other.
What is alternating current ac.
But this value may go higher in some.
As the name implies it flows first in one direction and then the other.
Alternating current ac is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current dc which flows only in one direction.
Ac can be produced using a device called an alternator.
As in the case with dc power the instantaneous electric power in an ac circuit is given by p vi but these quantities are continuously varying.
Mains electricity by country includes a list of countries and territories with the plugs voltages and frequencies they commonly use for providing electrical power to low voltage appliances equipment and lighting typically found in homes and offices.
Almost always the desired power in an ac circuit is the average power which is given by.
For industrial machinery see industrial and multiphase power plugs and sockets some countries have more than one voltage available.
The power going to minus the power going back is the real power.
Therefore the ac power changes with time but the dc power does not.
Alternating current ac is different to direct current.
Ac is used to deliver power to houses office buildings etc.
Graph of ac voltage over time the sine wave.
The term rms stands for root mean squared.
As a result the voltage level also reverses along with the current.
This is mainly due to the high internal resistance of the power supply 30 ohms.
Referring to the graph above the positive bits are power going to the load from the supply and the negative bits are power going back to the supply from the load.
Alternating current ac alternating current describes the flow of charge that changes direction periodically.
Where φ is the phase angle between the current and the voltage and where v and i are understood to be the effective or rms values.
Ac power vs dc power.
The instantaneous values of current and voltage changes over time in ac power sources while in dc sources they remain constant.
