Why does Japan have two power grids with different frequencies? Detailed answer

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

Why does Japan have two power grids with different frequencies? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Did you know?

Why does Japan have two power grids with different frequencies?

Usually, within one state, the mains voltage has a strictly defined frequency - either 50 Hz or 60 Hz. And in Japan there are two systems - in the western part the frequency is 60 Hz, in the eastern part - 50 Hz, and there are four frequency converters between them. This state of affairs arose due to the fact that generators from the German company AEG were purchased for the Tokyo power system in 1895, and for Osaka a year later, American generators from General Electric were purchased. Since then, each of these networks has developed according to its own standards, and it turned out to be too costly to unify.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

How to recognize a lefty?

Simple enough. Even if a person has been taught from childhood to write and hold a spoon with his right hand, ask him to put both palms together, interlacing his fingers. The left-hander will definitely put the thumb of his left hand on top.

Test your knowledge! Did you know...

▪ Why did Catholic missionaries force the island natives to cut down the coconut tree?

▪ How far can a motorcycle jump?

▪ What were the main features of the Hellenistic era?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

The world's tallest astronomical observatory opened 04.05.2024

Exploring space and its mysteries is a task that attracts the attention of astronomers from all over the world. In the fresh air of the high mountains, far from city light pollution, the stars and planets reveal their secrets with greater clarity. A new page is opening in the history of astronomy with the opening of the world's highest astronomical observatory - the Atacama Observatory of the University of Tokyo. The Atacama Observatory, located at an altitude of 5640 meters above sea level, opens up new opportunities for astronomers in the study of space. This site has become the highest location for a ground-based telescope, providing researchers with a unique tool for studying infrared waves in the Universe. Although the high altitude location provides clearer skies and less interference from the atmosphere, building an observatory on a high mountain poses enormous difficulties and challenges. However, despite the difficulties, the new observatory opens up broad research prospects for astronomers. ... >>

Controlling objects using air currents 04.05.2024

The development of robotics continues to open up new prospects for us in the field of automation and control of various objects. Recently, Finnish scientists presented an innovative approach to controlling humanoid robots using air currents. This method promises to revolutionize the way objects are manipulated and open new horizons in the field of robotics. The idea of controlling objects using air currents is not new, but until recently, implementing such concepts remained a challenge. Finnish researchers have developed an innovative method that allows robots to manipulate objects using special air jets as "air fingers". The air flow control algorithm, developed by a team of specialists, is based on a thorough study of the movement of objects in the air flow. The air jet control system, carried out using special motors, allows you to direct objects without resorting to physical ... >>

Purebred dogs get sick no more often than purebred dogs 03.05.2024

Caring for the health of our pets is an important aspect of the life of every dog owner. However, there is a common assumption that purebred dogs are more susceptible to diseases compared to mixed dogs. New research led by researchers at the Texas School of Veterinary Medicine and Biomedical Sciences brings new perspective to this question. A study conducted by the Dog Aging Project (DAP) of more than 27 companion dogs found that purebred and mixed dogs were generally equally likely to experience various diseases. Although some breeds may be more susceptible to certain diseases, the overall diagnosis rate is virtually the same between both groups. The Dog Aging Project's chief veterinarian, Dr. Keith Creevy, notes that there are several well-known diseases that are more common in certain breeds of dogs, which supports the notion that purebred dogs are more susceptible to disease. ... >>

Random news from the Archive

Sun, alcohol and pedals 02.03.2009

The Hungarian company "ANTRO" has demonstrated in Budapest a working prototype of "environmentally friendly car".

The roof of a light (270 kg) three-seater car is covered with solar cells, from which lithium-ion batteries are charged. They can also be charged from a wall outlet. Batteries power four electric motors in the wheel hubs. This system allows you to travel 15-20 kilometers on a single charge.

There is also a low-power internal combustion engine running on biofuel - ethyl alcohol, obtained from plant biomass. It spins a generator that recharges the batteries. Finally, another way to recharge - the driver and passengers can pedal like bicycles.

Other interesting news:

▪ Single transistor SRAM cell architecture

▪ The street is lit by the sun and the wind

▪ bubble shower

▪ Wireless data transmission 1 terabit per second

▪ Laboratory in a vest pocket

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Frequency synthesizers. Selection of articles

▪ article Metrology, standardization and certification. Crib

▪ What is the largest modern fish? Detailed answer

▪ article Glass cutter-compass. home workshop

▪ article Magnetic water. Encyclopedia of radio electronics and electrical engineering

▪ article Competition of two pencils. physical experiment

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews