váltakozását

Váltakozását, also known as "alternating current" or AC, is an electrical current that periodically reverses direction. This type of current is commonly used in power transmission and distribution systems due to its efficiency and ease of transformation. AC is characterized by its frequency, which is the number of cycles it completes per second, measured in Hertz (Hz). The standard frequency for AC power in many countries is 50 Hz or 60 Hz.

The primary advantage of AC over direct current (DC) is its ability to be easily transformed to different voltage levels using transformers. This makes AC suitable for long-distance transmission, where voltage levels are stepped up to reduce energy losses and then stepped down for local distribution. Additionally, AC can be generated more efficiently using rotating machinery, such as generators in power plants.

However, AC also has some disadvantages. It requires more complex circuitry for certain applications, such as rectification to convert it to DC. Furthermore, AC can induce electromagnetic interference (EMI) and radio frequency interference (RFI), which can affect nearby electronic devices.

Váltakozását is a fundamental concept in electrical engineering and plays a crucial role in the modern power infrastructure. Its properties and applications continue to be an active area of research and development.