mains electricity
Definition
Mains electricity is the electricity that comes out of the wall sockets in our homes. It is called mains electricity because it comes from the mains, which is the network of power lines that distributes electricity to our homes.
Mains electricity is alternating current (AC) electricity. This means that the direction of the current changes direction many times per second. The frequency of mains electricity is 50 Hz, which means that the current changes direction 50 times per second.
Mains electricity is generated by power plants. Power plants use a variety of sources to generate electricity, such as coal, natural gas, nuclear power, and renewable energy sources like solar and wind power.
The electricity from power plants is then transmitted through a network of power lines to substations. Substations step up the voltage of the electricity so that it can be transmitted over long distances. The electricity is then stepped down at substations near homes and businesses so that it can be used safely.
Mains electricity is used to power a variety of devices in our homes, such as lights, appliances, and electronics. It is also used to power businesses and industries.
Mains electricity is a vital part of our modern world. It provides us with the power we need to live, work, and play. However, it is important to be careful around mains electricity because it can be dangerous.
How can the word be used?
The mains electricity outlet is located behind the sofa.
Different forms of the word
Noun: The electrical power that is supplied to homes and businesses from a central source, such as a power plant.
Adjective: Describing something that is powered by mains electricity. For example, you could say "mains electricity outlet" or "mains electricity cable".
Etymology
The word "mains electricity" comes from the noun "mains", which refers to the main electrical supply to a building, and the noun "electricity", which is the flow of electrons through a conductor.
The word "mains electricity" was first used in English in the early 20th century. It was originally used to describe the electrical power that was supplied to homes and businesses from a central source, but it soon came to be used in a more general sense to describe any electrical power that was not generated on-site.
Question
What safety procedures do you need to follow when working with mains electricity?
AQA Science Exam Question and Answer
Question:
Explain the term "mains electricity" and discuss its significance in powering our daily lives. Provide examples of devices that rely on mains electricity for operation.
Answer:
Mains electricity refers to the alternating current (AC) electrical power supplied to homes, businesses, and other buildings through the power distribution network. It is the standard form of electricity that powers a wide range of devices and appliances in our daily lives. Mains electricity is typically supplied at a voltage of 230 volts in many countries.
The significance of mains electricity is immense in modern society. It serves as the lifeblood of our technological advancements, powering essential devices we rely on daily. Devices such as lights, refrigerators, air conditioners, televisions, computers, and smartphones all operate on mains electricity. Without it, our lives would be drastically different, as we wouldn't have the convenience and efficiency provided by these devices.
The distribution of mains electricity involves power plants generating electricity, which is then transmitted through high-voltage power lines. Transformers lower the voltage for safer distribution to homes and buildings. The ease of accessing and using mains electricity has revolutionised industries, communication, and entertainment.
In conclusion, mains electricity is the fundamental form of electrical power that powers a myriad of devices and appliances we use in our daily lives. Its seamless distribution and utilization have transformed the way we live, work, and interact, making it an indispensable part of modern society.