What is Direct Current ?

AC current uses a standard "rhythm" in which each side gets its turn 60 times each second

Disadvantages of DC

. Additionally, HVDC allows different AC systems (e.g. 50 Hz and 60 Hz) to be connected. Despite its advantages, HVDC systems are more costly and less reliable than the common AC systems.

thus the 60Hz designation given to standard AC current in North America.

High cost when dealing with high current systems; i.e. larger cables, fuses, switches and other components required for high current, low voltage applications

In the end, Edison, Tesla, and Westinghouse may have their wishes come true. AC and DC can coexist and each serve a purpose.

You should now have a good understanding of the differences between AC and DC. AC is easier to transform between voltage levels, which makes high-voltage transmission more feasible.

. This switching of polarity takes the form of a rhythmic pulse in the electrical current that occurs within the normal audible range

Difficult to obtain DC appliances and equipment

DC, on the other hand, is found in almost all electronics. You should know that the two do not mix very well,

you will need to transform AC to DC if you wish to plug in most electronics into a wall outlet. With this understanding

Higher chances of fire hazards when maximum circuit ratings and wire sizes are not strictly adhered to

ou should be ready to tackle some more complex circuitry and concepts, even if they contain AC.

DC is used in almost all electronics equipment

. This is why you can actually hear this rhythm in circuits such as fluorescent lighting ballasts and audio equipment as a low buzzing tone.

electric vehicles, automation, control of electrical

This buzz is referred to as "sixty cycle hum". Two AC power schemes were used in North America prior to the 1970s.

Most office and domestic equipment such as TVs, audio systems

One offered energy at 45-50Hz, the other at 60Hz. "Fifty-cycle power",

The electricity is always the same polarity, which means that in a two-wire circuit, one "wire", or side of the circuit, is always negative,

AC into the desired DC for the equipment.

A direct current circuit is an electrical circuit that consists of any combination of constant voltage sources

, and the negative side is always the one that sends the electricity in DC circuits

constant current sources, and resistors. In this case

currents are independent of time