Alternating Current (AC) and Direct Current (DC) both are the types of electric current flow. The major difference between AC and DC is the direction in which electric current flow. In Alternating current, current keeps switching directions periodically – forward and backward. While, in the direct current it flows in a single direction steadily.
Alternating Current (AC)
In alternating current the electric charges flow changes its direction periodically. AC is the most commonly used and most preferred electric power for household equipment office and buildings, etc. It was first tested based on the principles of Michael Faraday in 1832 using a dynamo electric generator.
Alternating current can be identified in wave form called as sine wave, in other words it can be said as the curved line. These curved lines represent electric cycles and is measured per second. The measurement is read as Hertz or Hz.
Unlike alternating current, the flow of current in direct current do not changes periodically. The current flows in a single direction in a steady voltage. The major uses of DC is to supply power for electrical devices and also to charge batteries. For example, mobile phone batteries, flashlights, flat-screen television, hybrid and electric vehicles. DC has the combination of plus and minus sign, a dotted line or a straight lines.
Difference Between Alternating Current and Direct Current
|Alternating Current||Direct Current|
|AC can carry and safe to transfer longer distance even between two cities, and maintain the electric power.||DC cannot travel for very longer distance. If does, it loses electric power.|
|The rotating magnets causes the change in direction of electric flow.||The steady magnetism makes the DC to flow in a single direction.|
|The frequency of AC is depended upon the country. But, generally the frequency is 50Hz or 60Hz.||DC has no frequency of zero frequency.|
|In AC the flow of current changes it direction backwards periodically.||It flows in single direction steadily.|
|Electrons in AC keep changing its directions – backward and forward||Electrons only move in one direction – that is forward.|
Practise This Question
|CBSE Physics Syllabus Class 6||CBSE Physics Syllabus Class 7||CBSE Physics Syllabus Class 8||CBSE Physics Syllabus Class 9||CBSE Physics Syllabus Class 10|