The standard frequency of alternating current in the United States is what?

The standard frequency of alternating current in the United States is what?

• A. 50Hz
• B. 60Hz
• C. 120Hz
• D. 360Hz

Answer: (B)

The standard frequency of alternating current in the United States is 60Hz. This means that the current alternates direction 60 times per second, which is the frequency used for most residential and commercial electrical systems. The 60Hz frequency is a result of historical decisions made in the development of electrical systems in the early 20th century, which have remained consistent due to the widespread infrastructure that has been built around it. This standard allows for compatibility with a wide range of electrical devices and equipment commonly used across the country. Other frequencies, such as 50Hz, are used in different parts of the world, primarily in Europe and Asia, while frequencies like 120Hz and 360Hz are not standard for commercial or residential power and would be unusual in practical applications. Understanding the significance of this standard frequency is essential for working with electrical systems, as most appliances and devices are designed to operate effectively with this established frequency.

The standard frequency of alternating current in the United States is 60Hz. This means that the current alternates direction 60 times per second, which is the frequency used for most residential and commercial electrical systems. The 60Hz frequency is a result of historical decisions made in the development of electrical systems in the early 20th century, which have remained consistent due to the widespread infrastructure that has been built around it. This standard allows for compatibility with a wide range of electrical devices and equipment commonly used across the country.

Other frequencies, such as 50Hz, are used in different parts of the world, primarily in Europe and Asia, while frequencies like 120Hz and 360Hz are not standard for commercial or residential power and would be unusual in practical applications. Understanding the significance of this standard frequency is essential for working with electrical systems, as most appliances and devices are designed to operate effectively with this established frequency.