Is responsible for - зависит от

unidirectional current - ток в одном направлении

Figure 1- Limitation of Diode Figure 2- DC and AC Plate Resistance

Current by Space Charge

3. Translate the word-combinations

   1. space charge, plate resistance, internal plate circuit of the tube, direct current plate resistance, positive half cycle, alternating current source.

   2. temperature saturation is responsible for; limitation is caused by the presens of a space charge; it cannot be expressed in terms of Ohm's Law;

wide use is made of this characteristic.

3. Answer the questions

1. When do electrons form a cloud of negative charges in the surrounding space? 2. When could all the electrons eventually return to the cathode? 3. What is the useful working range of nearly all vacuum tubes? 4. What is known as the D.C. Plate resistance? 5. What is the D.C. plate resistance for many diodes? 6. In what cycles will current flow if an alternating voltage is applied to the plate?

2.1.5 Translate the sentences. Analyze forms and functions of the infinitives

1. Various metals are found to differ with respect to thermionic emission. 2.They assume temperature saturation to depent on the agreement of the to curves in the lower region. 3. The increase of plate voltage is sure to overcome the effect of space charge. 4. For a diode of this type, the D.C. plate resistance proved to be approximately twice as great as the A.C. plate resistance. 5. These resistances are unlikely to be constant for all voltages. 6. The ingineer spoke about different kinds of automatic controllers to be applied at their plate. 7. We consider the circuit of the TV set to have been improved. 8. The experiments are claimed to have been carried out at their plant. 9. It was easy for our mechanic to repair this device. 10. To obtain these data is necessary for carrying out further experiments.

2.1.6 Translate the sentences paying attention to the underlined words

1. High frequency currents are obtained due to the invention of electronic devices. 2. Both radio-transmitting devices and radio-receiving ones are the basic devices in radio engineering. 3. A sudden chage in radio engineering in 1924 was due to the application short waves. 4. Neither of his investigaitons was as significant as that one. 5. Labour productivity at the plant was greatly increased because of applying mechanization and automation. 6. Provided they apply a computer they will make these complicated operations much faster and more accurately. 7. One can use neither this instrument nor that one because both of them are out of order. 8. That A. S. Popov, a Russian scientist, invented the radio is known throughout the world. 9. The only device which has not yet been tested is the one sent to our laboratory yesterday. 10. This object is so far from us that it is hardly possible to determine its exact location without using a radar. 11. Since they used new methods of work they succeeded in mak­ing their experiment ahead of time. 12. They make exceedingly accurate measurements of range, altitude and azimuth as they use radars. 13. Radio is one of the greatest achievements of human genius for it is the world's means of communi­cation and propagating culture. 14. All these extremely important data have been obtained by means of numerous investigations. 15. The capacity of this motor is much greater than that of your engine. 16. The scientist carried out his investigations until he obtained the necessary data. 17. The electronic devices will be installed in the laboratory before the chief engineer comes. 18. After principles of electronic television had been suggested by B. L. Rosing they were put into practice by S. I. Kataev and other Russian specialists.

2.1.7 Give the basic forms of the following adverbs, translate them

evidently, extremely, eventually, precisely, nearly, approximately.

8. Find the synonyms to these words in the text, translate them

steady a, apparently adv, area n, speed n, accurately adv, idea n, sequence n, use v.

8. Describe figures 1 and 2 in English 2.2 Part 2

1. Remember the pronunciation of these words

characteristic, potential, relationship, mutual, similar, except, effect, apparent, impair, performance, straight, portion, desirable, distortion.

2. Read the words, pay attention to stress shifts

investigate-investigation; combine-combination; observe-observation; amplify- amplification; similar-similarity.

3. Find Russian equivalents to the English words

obtain v	отношение
correspond v	ослаблять
impair v	взаимный
furnish v	характеристика (работы)
permit v	перемещать(ся)
shift v	прямой
apparent a	причина
relationship n	похожий
performance n	снабжать
similar a	получать
mutual a	разрешать
straight a	соответствовать
reason n.	очевидный