VI. Прочтите и переведите предложения:

1. Like silicon and selenium, germanium is sensitive to light.

2. Outer-space relays like other relays are used for televi­sing programmes.

3. Like many other measuring devices ammeters are widely used in any experiment dealing with electricity.

4. A diode like any electron tube contains the cathode and the plate.

5. Cadmium sulphide and cadmium selenide like a number of other transistors act as insulators in the darkness.

VII. * Прочтите и переведите сочетания слов:

1. external influences; 2. sensitive to external influences;3. to act like insulators; 4. an insulating material; 5. to use admixtures; 6. admixtures introduced into a solution; 7. thin films; 8. film circuits; 9. sensitive film circuits; 10. a powerful source; 11. a powerful heat source; 12. to supply much heat; 13. lo supply constant pressure; 14, a powerful supply; 15. a d-c supply; 16. exposed to radiation; 17. exposed to sun's rays; 18. extremely sensitive to visible light; 19. to take this property into consideration; 20. in later experiments; 21. in later radioactivity investigations; 22. to create a powerful source of energy; 23. to consume little power; 24. great consumption of heat; 25. heat consumers;

26. hundreds of times

VIII. Прочтите предложения, определив функции герундия и при­частий I и II, и переведите предложения:

1. The results obtained being of prime importance, engineers used them in their investigations.

2. Electrons are obtained by using a heated filament for the negative electrode and protons are produced in a hydrogen-filled discharge tube from which ions pass to the main accele­rating tube.

3. There are several types of microphones being used, the most important of these being the dynamic microphone, the velocity microphone and the crystal microphone.

4. Being built on the basis of transistors lasers are success­fully used in technology.

5. The lead¹-acid battery employs a low-voltage constant-potential charging arrangement, the lamps being connected in parallel.

6. The charge of the electron being determined, it was easy to calculate its mass.

7. The main advantage of this instrument over the moving coil type instrument is that it is capable of measuring both alternating current and direct current.

8. Obtaining new data on the device sensitivity will be of great help for designers.

9. The new building housing the laboratory will be located at some distance from the main building of the plant.

10. The specific heat of solid element known, the approxi­mate atomic weight can be easily calculated.

¹ lead [led]—свинец

IX. Переведите, не пользуясь словарем:

Electric Cells

In this text we shall consider electric cells. Electrodes being of different materials, a cell supplies electric energy. In case the electrodes are of the same material they become charged but there is no difference of potential across the terminals¹. Iron and zinc plates are commonly used for producing negative electrodes since these materials produce a high charge. Carbon is commonly used to produce positive electrodes. The voltage output² of cells is from 1 to 2V. The value of the output depends only on the materials used for the electrodes. Besides, it depends on the electrolyte of a cell. It does not depend on the size of a cell and its construction, while the current capacity³ of a cell depends on the size of the electrodes. The larger the size of the electrodes, the more current capacity which they can supply. The size of the electrodes being increased, the current capacity also increases, the voltage output remaining the same. Such is the relation between the size of the electrodes and the current capacity.

Пояснения к тексту

1. across the terminals— на клеммах

2. the output — на выходе

3. the current capacity — пропускная способность