Why do we use sine waveform in alternating voltages and currents?

The sinusoidal waveform and use of three phases allows the electricty to drive induction motors which being brushless are very durable and quiet running. it also allows the use of transformers to change the voltage. Tranfromers having no moving parts, or active electronics are also very durable.

Why is alternating current a sine wave?

The waveform of an alternating current power circuit is a sine wave. When a vector points upward along the y-axis, the voltage or current has reached its positive maximum value, and when it points downward along the same axis, the negative maximum has been reached. The horizontal x-axis indicates a value of zero.

Why is AC power sinusoidal?

The AC current that powers your home happens to be sinusoidal because the generators we use produce sinusoidally varying currents by default. It is easier to use it as it is produced than convert it to something else. The net power in an AC cycle is not zero because power is a function of the square of the current.

Why do we use alternating voltage?

The main factor that went into the choice of AC over DC was that AC is more efficient. Its ability to travel back and forth made gave it the ability to travel over longer distances. Thus making it able to power more homes. Today, in 2018, we’re still using AC electricity for most of our homes and businesses.

Why is the sine wave the most common AC waveform?

A waveform is a representation of how alternating current (AC) varies with time. The most familiar AC waveform is the sine wave, which derives its name from the fact that the current or voltage varies with the sine of the elapsed time.

Why is it that the waveform in AC circuit is called sinusoidal?

DC Circuit and Waveform Sinusoidal waveforms are more generally called by their short description as Sine Waves. This means then that the AC Waveform is a “time-dependent signal” with the most common type of time-dependant signal being that of the Periodic Waveform.

Is AC current sinusoidal?

The term AC or to give it its full description of Alternating Current, generally refers to a time-varying waveform with the most common of all being called a Sinusoid better known as a Sinusoidal Waveform. Sinusoidal waveforms are more generally called by their short description as Sine Waves.

What is the purpose of alternating current?

Alternating current (AC) is the type of electric current generated by the vast majority of power plants and used by most power distribution systems. Alternating current is cheaper to generate and has fewer energy losses than direct current when transmitting electricity over long distances.

What is sine wave voltage?

A sinusoidal voltage has a maximum value of 10 V and a frequency of 100 Hz. If the voltage has a phase angle of 30°, what will be the instantaneous voltage at times of (a) t = 0, (b) t = 0.5 ms? The equation for the sinusoidal voltage will be: v = V m sin ( 2 π f t + φ ) The term 2πft, i.e. ωt, is in radians.

What is the difference between sine wave and alternating current?

15-4: Alternating Current When a sine wave of alternating voltage is connected across a load resistance, the current that flows in the circuit is also a sine wave. The sine wave frequency of an alternating voltage is the same as the alternating current through a series connected load resistance. 15-4: Alternating Current

When a sine wave of alternating voltage is connected across load resistance?

When a sine wave of alternating voltage is connected across a load resistance, the current that flows in the circuit is also a sine wave. The sine wave frequency of an alternating voltage is the same as the alternating current through a series connected load resistance.

What is the difference between alternating current and direct current?

Alternating Current. Direct current (DC) circuits involve current flowing in one direction. In alternating current (AC) circuits the voltage oscillates in a sine wave pattern: V(t) = V o sin(ωt) In a household circuit, the frequency is 60 Hz.

What is the frequency of a sine wave in a circuit?

In alternating current (AC) circuits the voltage oscillates in a sine wave pattern: V(t) = Vosin(ωt) In a household circuit, the frequency is 60 Hz. The angular frequency is related to the frequency, f, by: