In today’s world, next to oxygen lies the most important need of human and that is the electricity. Over the developing years, many changes have taken place. All the gadgets need electricity to run. Here electricity flows in two forms – AC i.e. Alternating Current and DC i.e. Direct Current.

The main difference between an AC and DC is the electron flow direction During the flow of electricity, in AC, the electrons keep on changing their direction, i.e. moving forward and backward whereas, in DC, electrons move in a single direction, steadily.

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During the flow of electricity, both the currents carry a different amount of energy. As the DC cannot travel larger distances, it begins to lose the energy gradually. Whereas, the AC can be transferred safely over long distances and thus can provide more amount of energy.

The source of current is the important aspect to be considered. AC is initiated from the AC generator, power plants and mains whereas, DC can be obtained from the solar panels and any cell or a battery.

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As we know that AC and DC travel in different directions so this direction of flow of electrons is caused due to a reason. AC continuously changes its direction due to the presence of the rotating magnet along the wire whereas, in DC flow, the wire consists of steady magnetism.

In AC, the frequency changes from country to country. It is basically taken as 50 Hz to 60 Hz depending upon the country whereas there is zero frequency in DC.

AC carries a current which varies with the time whereas, in case of DC, the magnitude of the current is constant.

A passive parameter does not require any energy to operate and also, it is not a source of energy. AC and DC have varying passive parameters. In AC, impedance has a significant role whereas, in DC, only resistance is the passive parameter.

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The power factor of the AC lies between 0 and 1 whereas, for DC, it is always 1.
AC is of many types including sinusoidal, trapezoidal, square and triangular, whereas the DC is of two types, i.e. pure and pulsating.

Moving further, now you must have gained enough knowledge and a better understanding of how AC is better than DC. Transformation of the AC between voltage level is easier, thus making the high voltage transmission attainable. Whereas DC is found in most of the electronic devices. These two forms of current do not mix together very well and for using the electronics by connecting them to the wall outlet, the conversion of AC to DC is necessary. Even if the device contains AC, then also you should be mastered at working on more complicated circuits. After reading this article, I hope now you have understood that why AC is better than DC.

1. Shaker says:

My question is that how to improve power factor in AC system.

2. Shaker says:

Electrical ENGINEER

3. sal says:

Not too informative. If distance was not a factor, which would be better to use? And if AC is better, why is DC still used?