- •Vocabulary 138
- •Electric current serves lis in a thousand ways
- •Exercises
- •Active Words and Expressions
- •Exercises
- •Exercises
- •Lightning
- •Active Words and Expressions
- •Exercises
- •Magnetism
- •Exercises
- •Idioms early history
- •Active Words and Expressions
- •Exercises
- •Lomonosov
- •Active Words and Expressions
- •Exercises
- •Volta's short biography
- •Electric current
- •Active Words and Expressions
- •What is heat?
- •Active Words and Expressions
- •Electric circuit
- •Voltmeter
- •Conductors and insulators
- •Active Words and Expressions
- •Exercises
- •Insulator surface treatment
- •Electromotive force and resistance
- •Active Words and Expressions
- •Exercises
- •Heating effect of an electric current
- •Active Words and Expressions
- •Exercises
- •III. Complete the following sentences:
- •IV. Answer the following questions:
- •V. Translate the following word combinations:
- •VI. Define the meaning of the prefixes in the following words, translate them:
- •IX. Translate tfie following sentences paying attention to the words in bold type:
- •X. Read and retell the following text.
- •If there were no electricity
- •XI. Speak on the heating effect of an electric current.
- •IV. Translate the following sentences and define the functions of tfie word that
- •V. Translate the following sentences paying attention to the words in bold type:
- •VI. Fill in the blanks with suitable prepositions and form sentences with the following infinitives: -
- •VII. Compare:
- •VIII. Translate the following sentences, paying atten- tion to the words in bold type:
- •IX. Form nouns from the following verbs and translate them:
- •X. Give a short summary of the text.
- •XI. Look at Fig. 9 and describe Oersted's discovery.
- •XII. Describe fig. 10.
- •VI. Read the following abbreviations:
- •VII. Define the following terms:
- •IX. Form five sentences combining suitable parts of the sentence given in columns I and II:
- •II. Answer the following questions:
- •IV. Define the following terms:
- •V. (a) Choose the right term; (b) explain the statement:
- •VI. Translate the following sentences:
- •VII. Translate the following text:
- •VIII. Retell the text.
- •Transformers
- •3 Single-pnase transformers stepping generator voltage up to 275.000 volts
- •2300 To 230 volt
- •2300 Volt motor
- •230 Volt induction motor
- •Transmission system
- •IV. Form as many words as possible using suffixes and prefixes. Define what parts of speech the new words are and translate them:
- •V. Form nouns from the following words using suitable suffixes:
- •VI. Translate the following word combinations:
- •VII. Arrange the following words and expressions in pairs of a) synonyms, b) antonyms:
- •IX. Compare:
- •X. Translate the following text:
- •XI. Retell the text
- •IV. Translate the following sentences using the Passive Voice:
- •V. Form sentences according to the models given below:
- •VI. Answer the following questions:
- •IV. Answer the following questions:
- •V. Define the following terms:
- •VI. Form six sentences using the following nouns quali- fied by adjectives:
- •VII. Translate the following text:
- •VIII. Describe Fig. 15.
- •IV. Translate the following sentences:
- •V. Translate the following sentences:
- •VII. Give a heading to each paragraph of the text. Explain why you have given such a heading.
- •VIII. Speak on:
- •IX. Translate the following text:
- •Active Words and Expressions
- •Exercises
- •IV. Translate the following words and word-combinations:
- •V. Answer the following questions:
- •VIII. Speak on the possible uses of solar energy.
- •IX. Read and retell the following story;
- •1. Energy
- •2. Electric fish
- •4. Surface tension
- •5. Electric meter
- •7. Refrigerator
- •10. Electron theory
- •11. Thermocouple and photocell
- •12. Electric lamp
- •13. Faraday's discovery
- •15. Steam turbine
- •16. Units of measurement
- •17. Plasma generator
- •18. Laser
- •19. Semiconductors
- •20. Steam power station
- •21. Hydroelectric power station
- •22. Current flow
- •23. Gases, solids, liquids and plasma
- •Idioms, Conjunctional and Prepositional Phrases
- •Vocabulary
- •Impulse wheel ['impals ,wi:l] активная турбина
Active Words and Expressions
a number of, appliance, means, to convert, to detect, desirable, efficiency, loss, negligible, principal, to remove, to send, waste, white-hot
Exercises
/. Translate the following sentences and change them according to the model given below:
Model: The sun is an unlimited source of almost all kinds
of energy.
It is the sun that is an unlimited source of almost all kinds of energy.
•1. Electric energy is changed into heat in the electrical appliances. 2. An increase in temperature increases the molecular motion. 3. Ampere showed the difference between the current and the charges. 4. Electricity is produced at steam power plants. The heating effect of the current is the subject of this article. 5. Overheating in transmission lines is most undesirable. 6. Work produces heat directly or indirectly. 7. The heat engine turns heat into work.
//. Find examples in the text illustrating the modality.
III. Complete the following sentences:
1. If I asked the teacher to explain grammar to me, she ... 2. If he had been to England last year, he ... 3. If I asked my sister to bring me the dictionary, she ... 4. If she asked her friend to help her, he ... .5. If they had been asked to carry the experiment out, they ...
1. ... provided the weather were fine. 2. ... unless it rains. 3. ... if we are free on Sunday. 4. ... provided we had had time yesterday. 5. ... if you brought me the textbook.
IV. Answer the following questions:
1. How can electricity be detected? 2. What are the prin- cipal effects of an electric current? 3. Why does the current- carrying wire become red-hot? 4. What does the heat produced per second depend upon? 5. Why is heat developed in a trans- mission line undesirable? 6. What device turns heat into work? 7. What do we call the heating effect of an electric current? 8. When does the conductor become white-hot? 9. What takes place inside any electric heating device?
V. Translate the following word combinations:
at least; thanks to; because of; as to; in case; at times; in short; by means of; in spite of; instead of; all over the world
из-за лучистой энергии; при помощи теплового двигателя; благодаря химической реакции; в случае уменьшения кпд; что касается тепловой потери; по крайней мере внутри лампочки; иногда это желательно; короче говоря; во всем мире; что касается нити накала; вместо механической энергии; несмотря на разность потенциалов
VI. Define the meaning of the prefixes in the following words, translate them:
irreplaceable, supernatural, overloaded, reaction, invaluable, discharge, indirectly, outstanding, semiconductor, impossible
VII. Comrade A.y ask Comrade B.\ Comrade В., answer Comrade A.'s questions:
a) 1. if it is possible to convert electric energy into heat.
2. if we can obtain heat from the. sun by employing ra- diant energy.
if he is able to look inside a hot electric iron.
if it is desirable at times to remove heat.
if heat decreases efficiency.
b) 1. what the three principal effects of an electric cur- rent are.
how the current passing along the wire can be detected.
where different electrical appliances are used.
when overheating is most undesirable and even dangerous.
VIII. Use the conjuctions either ... or, neither ... nor, both ... and in sentences given below:
Model: He will read or write.
He will either read or write. He will neither read nor write. He will both read and write.
1. She speaks English or German. 2. He or she can translate this article. 3. We shall go by bus or by tram.