Вопросы и задания.

I.Дайте ответы на следующие вопросы:

1. Who was the first to produce а soursе of continuous current?

2. After whom was the unit of current named?

3. Who determined the difference between the current and the static charge?

4. What did Ampere suppose?

5. What can you say about an electron?

6. What charges do you know?

7. When does a wire carry an electric current?

8. Do liquids conduct current?

9. What can you say about electrolytes?

10. What do you call d.c.?

11. What is the advantage of a.c.?

12. Where is a.c. used?

13. Who first applied a.c.?

2. Верны ли следующие утверждения?

1. Electrons flow from the positively charged terminal of the battery to the negatively charged terminal.

2. Ampere supposed thе current to flow from the negative pole to the positive one.

3. Static electricity is not very high in voltage and it is easy to control it.

4. Static electricity is used for practical purposes.

5. The direct current is known to flow first in one direction and then in the opposite one.

3. Разбейте текст на смысловые части и озаглавьте их.

IV. Расскажите об электрическом токе, используя следующие выражения:

to produce a source of continuous current, the current direction, the flow of moving electrons, the unit of electric pressure, alternating current, direct current, static electricity, electric current.

VI. Составьте аннотацию к тексту, используя подходящие клише из представленных ниже:

the characteristics of … are discussed, the use of … is discussed, the requirements of … are examined, the effects of … explained, the method of … is introduced, data on … are presented, the relation between … is examined, the significance of … is examined, the application of ... is discussed, a comparison is made between … , special attention is given to …

Грамматика.

3. Независимый причастный оборот. Субъектный инфинитивный оборот. Объектный инфинитивный оборот.

Упражнения.

I. Переведите на русский язык следующие предложения, содержащие независимый причастный оборот:

1. Accuracy having been infinitely improved through increased use of microwaves and the development of electron tubes capable of handling such wavelengths, the usefulness of radar has been considerably expanded.

2. The vast majority of students being provided with living allowances from the state, they do not have to call on their parents for material help.

3. The humanities, the natural and exact sciences are today penetrating more into the sphere of social phenomena, no modern scientist being able to get along without understanding society and man’s place in it.

4. Automation having been firmly established in space research, our spaceships employ automatic instruments in the study of cosmic space.

5. As the radium decomposed, it passed through several stages forming new substances, lead being the final product.

6. Electrical machines perform a giant’s share of the work done today, this share steadily increasing.

7. Atmospheric air being put under increased pressures, its volume is reduced according to Boyle’s law.

8. Temperature remaining the same, the volume of a gas varies inversely with the pressure.

9. Zing being the cheapest metal with a strong tendency to lose electrons, we commonly use it for the production of electric current.

10. Many technical and scientific problems having been solved, the first spaceflight could be realized.

11. Radium having been discovered, scientists found that the effects produced by it were caused by the break-up of its atoms.

12. Vast sums being spent on education in our country, our state is able to provide qualified specialists for all branches of industry.