3. Translate the following groups of words into Ukrainian:

To amplify – amplifier –amplification; special – specialist – speciality – especially; current – direct current , alternating current, to rectify – rectifier – rectification; physics – physicist – physical; to mean – mean – means; list – to list; to solve – solution – to solve a problem; to heat – heat – hot; to use – use – useful – useless; power – powerful – powerless.

4. Group up the words with the same meaning ( synonyms ):

Because, basis, simple, modern, up-to-date, foundation, plain, as, to utilize, first, to employ, rapid, to use, quick, to solve, fast, profound, field, to find solution, to connect, deep, branch, to join, significant, important, for the first time.

5. Translate the following sentences into Ukrainian:

1. Electronics solves the most complicated problems in automation and production processes by relatively simple means.

2. The mercury rectifier is a device for economical conversion of alternating current into direct current.

3. A lot of problems find solution in modern electronics.

4. The development of electronic amplifiers has made it possible to utilize a number of familiar physical phenomena.

5. Photocells became widely used only in conjunction with electron valves.

6. Especially important was the use in electronics of the photoelectric effect, i.e., the emission of electrons by a metal under the action of light.

7. The first two-electrode valves were made in 1904.

8. The Russian physicist Stoletov was the first to formulate the law of electron emission by a heated body.

9. The preparatory stage in the development of electronic devices was laid primarily by the profound researches of the Russian physicist Stoletov.

6. Use the verbs in brackets in necessary tense-form:

1. Electronics (to be) the basis of modern automation.

2. It (to solve) the most complicated problems in automation.

3. It (to be) possible to use this method.

4. It (to be) necessary to solve this problem long ago.

5. The first two-electrode valves (to be made) in 1904.

6. The development of electronic amplifiers (to make) it possible to utilize a number of familiar physical phenomena.

7. The discovery of radio by A. Popov (to give) a powerful stimulus to the development of electronics.

8. The use of a grid (to make) it possible to use the three-electrode valve as an amplifier.

9. Great progress (to be achieved) in the field of electronics.

10. Photocells (to be used) in sound films.

11. The photoelectric effect (to be discovered) by Stoletov.

7. Answer the following questions:

1. What does electronics study?

2. Why is electronics the basis of modern automation?

3. Is it possible to list the industrial and scientific problems that find solution in modern electronics?

4. Who formulated the law of electron emission by a heated body?

5. What discovery gave a powerful stimulus to the development of electronics?

6. What made it possible to use the three-electrode valve as an amplifier?

7. What was the first ionic power device?

8. Who made the first photocell?

9. Where are photocells used?

10. What principle is employed in cathode-ray tubes?

11. Where are cathode-ray tubes used?