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LESSON ONE

ELECTRIC CURRENT SERVES MAN IN A THOUSAND WAYS

The electric current was born in the year 1800 when Volta constructed the first source of continuous current. Since that time numerous scientists and inventors, Russian and foreign, have greatly contributed to its further development and practical application.

As a result, one cannot imagine modern civilization without the electric current. We can't imagine how people could do without the electric lamp, without vacuum cleaners, refrig­erators, washing machines and other electrically operated devices that are widely used today. In fact, telephones, lifts, electric trams and trains, radio and television have been made possible only owing to the electric current.

The student reading this article is certainly familiar with the important part which the electric current plays in our everyday life. From the moment when he gets up in the morning until he goes to bed at night, he widely uses electric energy. Only going to the university either on foot or by bicycle, can he do without electricity. In fact, it is well known that electric current is necessary for the operation of trolley-buses, trams, buses and modern trains.

During the day he (that is the reading student) will also use some electrical devices, working in the laboratory, mak­ing use of the telephone, the lift, the tram and so on. As for the evening, if he studies or reads, by an electric lamp, watches television, goes to the theatre or cinema, he certainly uses electricity.

Some people are more familiar with the various applica­tions of the electric current in their everyday life than they are with its numerous industrial applications. However, elec­tric energy finds its most important use in industry. Take, for example, the electric motor, transforming electric energy into mechanical energy. It finds a wide application at every mill and factory. As for the electric crane, it can easily lift objects weighing thousands of tons.

A good example which is illustrating an important indus­trial use of the electric current is the electrically heated furnace. Great masses of metal melted in such furnaces flow like water. Speaking of the melted metals, we might mention one more device using electricity—that is the electric pyro­meter. The temperature of hot flowing metals can be easily measured owing to the electric pyrometer.

These are only some of the various industrial applications of the electric current serving us in a thousand ways.

Exercises

1. Learn the following active words and use them in the sentences of your own

Apply (v) применять, использовать

Application (n) применение

Current (n) ток

Device (n) прибор, устройство

Develop (v) разрабатывать, развивать(ся)

Electricity (n) электричество

Furnace (n) печь

Industrial (a) промышленный

Invent (v) изобретать

Measure (v) измерять

Serve (v) служить, обслуживать

Scientist (n) ученый

2. Translate the following chains of words into Russian, define what part of speech they are:

Science – scientist – scientific-scientifically; develop – developer - developing - development, invent - inventor - invention; measure- measuring- measurement; apply – application - applicable— appliance; use – user – useful - useless - usage; transform - transformer - transformation; electric- electricity – electrical - electrically; serve - server-service - servant.

3. Look through the text and write out the English equivalents of the following words and word combinations. Use them in the sentences of your own.

Что касается, обходиться без чего-либо, использовать , играть роль, вносить вклад в, благодаря чему-либо, становиться возможным, либо…либо, в действительности.

4. Make word combinations using adjectives in the left column and the nouns in the right column.

Modern application

Numerous development

Further inventors

Electric civilization

Industrial current

The Participle

Participle I

Participle II

Perfect Participle

Active: writing

Passive: being written

written

having written

having been written

3. Translate the following sentences paying attention to the parti­ciple:

1. The student is translating an article on refrigerators.2. The student has translated an article. 3. The article is translated by the student. 4. The article is being translated by the student. 5. The student translating an article is my fellow-student. 6. The article translated by the student is difficult. 7. Translating an article, the student used a dictionary. 8. Having translated the article, the student gave it to the teacher. 9. Having been asked to translate the article, the student translated it very well.

4. Form four sentences using the words given below.

1. lift, the, heavy, can, electric, objects, crane.

2. finds, industry, energy, in, application, electric, wide, a

3. does, study, he, at, not, the, institute

4. day, use, every, do, devices, you, electrical

5. the theatre, go, to, we, yesterday, not, did

5. Give short answers to the following questions:

1. Does the motor find a wide application in industry? 2. Is Volta a Russian scientist? 3. Does your friend go to the university on foot? 4. Did you go to the theatre yesterday? 5. Is there an electric lamp on your table? 6. Has your friend bought a new bicycle? 7. Are there many trolley-buses and trams in Moscow? 8. Do you watch television every day? 9. Do you use electrical devices? 10. Can you do without electricity? 11. Does the electric current play an important part in our life? 12. Does the electric motor transform electri­cal energy into mechanical energy? 13. Is the electric current necessary for the operation of trolley-buses and trams? 14. Is your room heated by an electric furnace?

6. Complete the sentences.

1. In 1800 Volta constructed the first source of …. … 2. One cannot imagine … … without the electric current. 3. Today we widely use many … … devices. 4. Electricity has numerous … … 5. Electric motor transforms … energy into … one. 6. Electricity finds … … at every factory. … … furnace is a good example of the industrial application of electricity. Electric … measures the temperature of hot flowing metals.