Power Engineering. Соколова Е.В. - 10 стр.

      3 Lesson 3

      3.1 Прочтите слова согласно транскрипции

      toward , thrust, change , magnitude , hold, iron

      3.2 Прочтите слова, обращая внимание на смещение ударения

     experiment—experimenter; magnet—magnetic; indicate — indication; metal
— metallic; polar — polarity.

      3.3 Сгруппируйте эквиваленты

       electrical machinery, bar magnet, sensitive current indicator, motionless, con-
necion, with respect to , magnitude, opposite polarity, lines of forces, at right angle,
to cut the line

      противоположная полярность, неподвижный, силовые линии, электриче-
ское оборудование, магнитный брусок, по отношению к , под прямым углом,
пересекать линию, соединение, величина, чувствительный индикатор то

      3.4 Прочтите вопросы перед каждым абзацем текста и найдите отве-
ты

       1. What did Faraday produce? 2. What happened when a bar was thrust into the
coil? 3. What are the facts underlying Faraday's discovery? 4. Is there any discovery
in electrical engineering which has been so important as Faraday's?

      Faraday’s discovery

       1. The important discovery on the way toward present day electrical machinery
was that of the celebrated English .experimenter, Faraday. He produced rotation of a
wire carrying electrical current, around a magnetic pole. The experiment may be
repeated by anyone who has a coil of wire, а|.,т magnet and a sensitive current indica-
tor.
       2. Faraday's experiment was the following: when the bar magnet, or the coil
carrying the current, was motionless there was no motion of the needle. When a bar
was thrust into the coil the needle moved in one direction. The motion of the bar be-
ing reversed, the needle reversed its motion too. There was no metallic connection
between the two coils, or between the coil and the bar magnet—and yet changing po-
sition of one with respect to the other, or changing the direction or magnitude of cur-
rent one coil produced some electrical effect in the other circuit.
       3. The facts underlying. Faraday's experiment are these an electric voltage was
generated or induced in the coil when the bar magnet was thrust into it. A voltage of
opposite polarity was generated when the magnet was removed. This voltage sent a
12