10. Popov made an apparatus which became the greatest means of communication.
a) device b) invention c) achievement
11. He laid the foundation for further progress in the field of radio-engineering.
a) result b) experiment c) branch
12. The day when the invention was demonstrated is the date of the birth of the radio.
a) provided b) shown c) completed
13. The methods of radio-engineering are now used in various fields of science.
a) different b) immense c) important
14. The words Heinrich Herz were transmitted by wireless telegraphy in Morse code.
a) made b) realized c) sent
IV. . .
| 15. | The story of radio begins | a) | was constructed near Moscow. |
| 16. | Popov lived and worked | b) | studied with the help of radio. |
| 17. | Distant areas of the Universe are | c) | with Joseph Henry, an American physicist. |
| 18. | In 1920 a powerful radio telephone station | d) | made of some kind of radio equipment. |
| 19. | There is no branch of science where use is not | e) | under very hard conditions. |
, , . less, -al, -ly, -er/or, -y, -tion, -ist, -ance, -ant, -ment.
I. ance, -er, -y, -ist, -tion, -al, -less, -ly, . .
| 1. | receive | 5. | practice |
| 2. | successful | 6. | produce |
| 3. | discover | 7. | special |
| 4. | wire | 8. | import |
II. , , . To invent, to achieve, to communicate, to assist .
9. Radio devices perform various tasks.
10. Radio occupies one of the leading places among the greatest of modern engineering.
11. A.S. Popov the great Russian - was born in 1858.
12. Popov carried out many experiments together with his Rybkin.
13. The tsarist government did not give any to Russian scientists.
III. , Participle II , .
14. Heinrich Hertz proved by experiments the existence of electromagnetic waves.
15. Popov solved many technical problems such as the introduction of electricity into the Navy.
16. After many experiments the device constructed by Popov began receiving electromagnetic waves.
IV. ing.
17. Creating new research institutes we develop our science.
a) b) )
18. Measuring resistance is necessary in many experiments.
a) b) )
19. In solving problems it is necessary to distinguish between facts and hypothesis.
a) b) )
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V. . .
20. While experimenting / experimented the scientist connected a wire to the receiver.
21. The first radio-receiving set was demonstrated / demonstrating by A.S. Popov in 1895.
22. Having connected / Connected wires to the receiver he increased its range ().
23. The experiments carrying out / carried out by Popov at sea were very successful.
VI. , .
24. He always carried on some practical work, solving many technical problems.
25. Popov has become the inventor of the radio, May, 7, being celebrated each year as Radio Day.
26. All the experiments having been completed, serious practical testing began.
27. In this way the future wireless communication between the continents was being prepared.
, , , .
