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Прочитайте текст и выберите утверждение соответствующее содержанию текста Radio was invented in Russ...: ответ на тест 606973 - Английский язык

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Radio was invented in Russia. The world’s first receiver was constructed in 1895 by the great Russian scientist Alexander Popov. There were no transmitters then, therefore his receiver could only pick up signals produced by lightning discharges during a thunderstorm. A. Popov demonstrated a device called a “storm indicator” at a meeting of the Russian Physico-Chemical Society in St. Petersburg on May 7, 1895. This day is marked now as Radio Day.
Варианты ответов
  • At the end of the 19th century transmitters didn’t exist.
  • The world’s first receiver was constructed by Morse.
  • Radio was invented in Germany.
  • The meeting was held at British mathematical Society in St. Petersburg.
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Вопрос задал(а): Анонимный пользователь, 12 Ноябрь 2020 в 20:12
На вопрос ответил(а): Анастасия Степанова, 12 Ноябрь 2020 в 20:12

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Вопрос № 347494

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Radio was invented in Russia. The world’s first receiver was constructed in 1895 by the great Russian scientist Alexander Popov. There were no transmitters then, therefore his receiver could only pick up signals produced by lightning discharges during a thunderstorm. A. Popov demonstrated a device called a “storm indicator” at a meeting of the Russian Physico-Chemical Society in St. Petersburg on May 7, 1895. This day is marked now as Radio Day.
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Вопрос № 781519

Прочитайте текст и выберите утверждение, соответствующее содержанию текста
Radio was invented in Russia. The world’s first receiver was constructed in 1895 by the great Russian scientist Alexander Popov. There were no transmitters then, therefore his receiver could only pick up signals produced by lightning discharges during a thunderstorm. A. Popov demonstrated a device called a “storm indicator” at a meeting of the Russian Physico-Chemical Society in St. Petersburg on May 7, 1895. This day is marked now as Radio Day.
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Вопрос № 606974

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Alexander Popov found a way of transmitting Morse code signals. In 1897 he sent the world’s first wireless telegram over a distance of 600 m and four years later the range of transmission was increased to 150 km. Ever since, thanks to the work of many scientists of the world, the methods of transmission and reception have been constantly improved. Nowadays radio communication has no limits.

Вопрос № 606975

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Teletypewriters are widely used for high speed telegraph communications as well as for transmission of written messages. For economical transmission over long distances it is essential that only a single wire or transmission channel be required to carry the signal. Furthermore, the reliable and efficient operation can be secured by using not more than two conditions on the line, such as current and no current, or positive impulses and negative impulses.

Вопрос № 606976

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Electricity complete changed communications. Once it was discovered that аn electric current would flow along a wire, it seemed possible that it could be used for messages. As long as two places were connected by a wire electric currents could be sent along it. They could be sent with the speed of light. The question was how could electric current make words?

Вопрос № 606977

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Real telegraphs were possible until it was proved that electricity and magnetism were connected. It was found that a needle of a compass moved when it was put near а wirе with a current flowing through it. A compass needle is a magnet. If a wire carrying a current could move it, then the wire must be a magnet too.
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