How can AC current be generated?

An alternating current is produced by an electric generator. As the wire rotates in the magnetic field, the changing strength of the magnetic field through the wire produces a force which drives the electric charges around the wire. The force initially generates an electric current in one direction along the wire.

What is imaginary part of current?

Impedance (symbol Z ) is used in AC technology as a resistor in the current and voltage that are not in phase. The imaginary part of impedance is called reactance. …

How do you represent AC current?

A sinusoidal alternating current can be represented by the equation i = I sin ωt, where i is the current at time t and I the maximum current. In a similar way we can write for a sinusoidal alternating voltage v = V sin ωt, where v is the voltage at time t and V the maximum voltage.

Why are there imaginary numbers in AC circuits?

These imaginary quantities are not some kind of magic electricity or resistance. We use imaginary numbers to represent time delays in circuits. That leads to the second way to write a complex number: polar notation. If the point on the graph is 5 + 3j, you can note that a vector can represent the same point.

Is impedance real or imaginary?

Impedance is the vector sum of the capacitance ( imaginary ) and the resistance (real) of the circuit in question.

How are imaginary numbers used in electricity?

Imaginary numbers are particularly applicable in electricity, specifically alternating current (AC) electronics. AC electricity changes between positive and negative in a sine wave. Essentially, if what is being measured relies on a sine or cosine wave, the imaginary number is used.

Why AC current is used in homes?

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.

How do you convert magnitude and phase to real and imaginary?

Conversion between the two notational forms involves simple trigonometry. To convert from polar to rectangular, find the real component by multiplying the polar magnitude by the cosine of the angle, and the imaginary component by multiplying the polar magnitude by the sine of the angle.

How does an AC generator generate DC current?

1 An AC generator equipped with a device called a “commutator” can produce direct current 2 Use of a device called a “rectifier” that converts AC to DC 3 Batteries provide DC, which is generated from a chemical reaction inside of the battery

What is AC ( alternating current)?

It can also be defined as an electrical current which repeatedly changes or reverses its direction opposite to that of Direct Current or DC which always flows in a single direction as shown below. From the graph, we can see that the charged particles in AC tend to start moving from zero.

Why do we use a magnetic field to generate AC current?

This is because the current is produced by a changing magnetic field – a changing field induces a voltage in nearby wire. This hints at other examples of AC – when we need to step up or down a voltage. We use transformers that use the magnetic field to “transform” AC signals.

What is the difference between AC and DC current?

Both AC and DC describe types of current flow in a circuit. In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically.