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Alternating Current (AC) vs. Direct Current (DC)
In today’s world electricity is most important next to the oxygen in the human. When the electricity was invented many changes have taken place over the years. The dark planet turned into a planet of lights. In fact, it made life so simple in all circumstances. All the devices, industries, offices, houses, technology, computers run on electricity. Here energy will be in two forms, i.e. alternating current (AC) and direct current (DC). Regarding these currents and the difference between AC and DC will be discussed in detail, its basic function and uses of it. Its properties are also discussed in a tabular column.
The difference between AC and DC
Alternating Current (AC)
Alternating current is defined as the flow of charge that changes direction periodically. The result obtained will be, the voltage level also reverses along with the current. Basically, AC is used to deliver power to industries, houses, office buildings, etc.
Generation of AC
AC is produced by using called an alternator. It is designed to produce alternating current. Inside of a magnetic field, a loop of wire is spun, from which induced current will flow along the wire. Here the rotation of the wire may come from any no of means i.e. from, a steam turbine, flowing water, a wind turbine, and so on. This is because of the wire spins and enters into different magnetic polarity periodically, the current and voltage alternate in the wire.
From this, the generated current can be of many waveforms like sine, square and triangle. But in most of the cases, the sine wave is preferred because it is easy to generate and calculations can be done with ease. However, the rest of the wave requires an additional device to convert them into respective waveforms or the shape of the equipment has to be changed and the calculations will be too difficult. The description of the Sine waveform is discussed below.
Describing a Sine Wave
Generally, the AC waveform can be understood easily with the help of mathematical terms. For this sine wave, the three things which are required are amplitude, phase, and frequency.
DC Source
In a DC circuit, electrons emerge from the minus or negative pole and move towards the plus or positive pole. Some of the physicists define DC as it travels from plus to minus.
Generally, the basic source of direct current is produced by batteries, electrochemical, and photovoltaic cells. But AC is most preferred across the world.
In this scenario, AC can be converted to DC. This will happen in multiple steps. Initially, the power supply consists of a transformer, which later converted into DC with the help of a rectifier. It prevents the flow of current from reversing and a filter is used to eliminate current pulsations in the output of the rectifier. The is the phenomenon of how AC is converted into DC.
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