Практикум по английскому языку по специальности " Электроснабжение"
методическая разработка по английскому языку (11 класс)

ДЕПАРТАМЕНТ ОБРАЗОВАНИЯ И МОЛОДЁЖНОЙ ПОЛИТИКИ ХМАО-ЮГРЫ

БЮДЖЕТНОЕ УЧРЕЖДЕНИЕ

 ПРОФЕССИОНАЛЬНОГО ОБРАЗОВАНИЯ ХМАО-ЮГРЫ

НЯГАНСКИЙ ТЕХНОЛОГИЧЕСКИЙ КОЛЛЕДЖ

Практикум

 по английскому языку

для студентов по специальности

«Электроснабжение»

Преподаватель: Карпова М.А.

уровень квалификации:

первая

квалификационная категория

Нягань,  2020

Lesson 1.

1. Read and translate the text.

The Concept of Electrical Current

In the beginning of the 17th century Sir William Gilbert discovered that many substances could be electrified by friction. Gilbert named this effect «electric» after the world «electron» - the Greek name for amber. In 1756 the great Russian scientist M. V. Lomonosov was the first to make theoretical analysis of electrical phenomena.

At present the nature of electrification is explanted by the electron theory. According to the modern theory all matter is composed of atoms or tiny particles. There are many kinds of atoms. Each atom consists of a nucleus, a small positively charged mass and a number of lighter negatively charged particles called electrons, which revolve around the nucleus. Normally each atom of a substance is electrically neutral, or it has equal amounts of negative and positive charges, i.e. produces no electrical effects. If the number of negative charges is not equal to the number of positive charges, the matter will produce electrical effects.

When an electric charge is at rest it is spoken of as static electricity, but when it is in motion it is referred to as an electric current. In most cases, an electric current is described as a flow of electric charges along a conductor.

Not all substances are good conductors of electricity, as a general rule metals are good conductors of electricity, whereas nonmetals are poor conductors. The poorest of conductors are commonly called insulators or nonconductors. There are a large number of substances that are neither good conductors of electricity nor good insulators. These substances are called semi-conductors. An electric current which flows in the same direction through a conductor or a current which does not change its polarity is called a direct current or a continuous current. Its abbreviation is D. C. An alternating current (A. C.) flows first in one direction and then in the other.

An electric circuit is a path through which an electric current flows. This is a complete path along which electrons can transmit their charges. An electric circuit includes a battery, generator, or magnetic means for producting current flow. Some portion of the circuit is made to do useful work.

The circuit is said to be open when no charges can move due to a break in the path. The circuit is said to be closed when no break exists-when switches are closed and all connections are properly made.

Special symbols are used to show electrical systems. There is a wide range of these symbols. There are some of them which are used when we draw circuits. And now look at the diagram of series and parallel arrangements.

2. Write down new words and learn them.

1) insulator-изолятор

2) substance-вещество, материя

3) friction-трение, сцепление

4) nucleus-ядро, ячейка

5) amount-сумма, количество

6) charge-заряд, загрузка

7) rest-покой, отдых

8) motion-движение

9) flow-поток, течение

10) circuit-цепь, кругооборот

11) current-течение, ток

12) path-путь, дорожка, линия

13) break-прорыв, интервал, перелом

14) To discover-открывать

15) To make-делать

16) To explain-объяснять

17) To consist-состоять из

18) To revolve-вращаться

19) To produce-производить

20) To transmit-передавать

21) To include-включать

22) To exist-существовать

23) To use-использовать

24) Tiny-маленький, крошечный

25) Light-легкий, светлый

26) Equal-равный

27) Poor-бедный, слабый

28) Continuous-непрерывный, постоянный

29) Wide-широкий

30) Alternating-переменный

3. Find in the text.

А) интернационализмы б) ложные друзья переводчика

4. Translate sentences and find the Infinitive

1. The capacity to absorb heat varies between substances.
2. Each object in nature has a particular temperature which can be compared with the temperature of other objects.
3. To make this comparison accurate thermometer is used.
4. Each atom is known to have a name and symbol.
5. To know the melting point of the metal in use is necessary.
6. I consider him to be the best qualified person in the laboratory.
7. Whenever the speed or velocity of a body changes, the body is said to have acceleration.
8. Laws and theories are formulated from the results of the experiments and then used to predict the results of new experiments.

Lesson 2

1. Read and translate the text.

Batteries

An Italian scientist Alessandro Volta made a` lot of experiments with electricity. Batteries as sources of electrical energy are the result of his experiments.

Today battery cells are produced in two common forms: dry cells, used in flashlights, portable radios, clocks, cameras and (well) wet cells, used in automobiles, airplanes, boats.

The voltaic cell is composed of three parts: a pair of dissimilar metal plates called electrodes, a dilute acid solution called electrolyte, and a nonconducting container called the cell. In a glass container filled with sulphuric acid there are two plates: one copper and are connected by a copper wire, electricity will flow through it from the copper plate to the zinc plate.

For the voltaic cell the copper plate is the positive electrode and the zinc plate the negative electrode a copper wire will convey electricity and is called an electrical conductor. Copper, aluminium and silver are good conductors. They must be surrounded by protective material which does not conduct electricity. Such materials are called electrical insulators (glass, wood, rubber, some plastics, insulation tape)

Remember that faulty insulation is dangerous and leads to unwanted electrical flow and probably to local overheating.

2. Write down new words and learn them.

1. Source-источник
2. Cell-элемент
3. Flashlight-сигнальный огонь
4. Plate-пластинка
5. Acid-кислота
6. Copper-медь
7. Wire-проволока, провод
8. Insulator-изолятор
9. Rubber-резина, каучук
10. Tape-лента, тесьма
11. To use-использовать
12. To compose-составлять
13. To fill-наполнять
14. To connect-соединять
15. To flow-течь
16. To convey-переправлять
17. To surround-окружать
18. To remember-помнить
19. Common-общий, частый
20. Portable-переносной
21. Dry-сухой
22. Wet-мокрый
23. Dissimilar-несходный
24. Sulphuric-серный
25. Faulty-неисправный
26. Dangerous-опасный

3. Fill in the gaps.

1. A battery is a source of ….
2. Battery cells are manufactured in ….
3. The voltaic cell is composed of ….
4. Cells connected together form ….
5. The positive electrode is ….
6. The negative electrode is ….
7. Series connection means ….
8. Materials which do not conduct electricity are called ….

Electrical, insulators, two common forms, electrical energy, copper plate, Zink plate, three parts, battery, the terminal of one cell is connected to

Lesson 3

1. Read and translate the text.

Electrical Measuring Units and Instruments

Any instrument which measures electrical values is called a meter. An ammeter measures the current in amperes. The unit is named after Andre Marie Ampere, a French scientist. A voltmeter measures the voltage and the potential difference in volts. The volt is named after Alessandro Volta, an Italian scientist.

The current in a conductor is determined by two things, the voltage across the conductor. The unit by which resistance is measured is called the ohm. The resistance in practice is measured with the ohmmeter, a wattmeter measures electrical power in watts. Very delicate ammeters are often used for measuring very small currents. Whenever an ammeter or voltmeter is connected to a circuit to measure electric current or potential difference the ammeter must be connected in series and the voltmeter in parallel.

2. Answer the questions

1. What does an ammeter measure?
2. Was Andre m. ampere a French or Italian scientist?
3. How is the current in a conductor determined?
4. What is the unit called by which resistance is measured?
5. Does a wattmeter measure electrical power?
6. How does an ammeter measure electric current?

3. Find English words in the text.

1Называется счетчиком

2. Назван в честь…
3. Ток в проводнике
4. Сопротивление проводника
5. Электрическая мощность
6. Очень чувствительные
7. Часто используются
8. Измерять электрический ток
9. Потенциальная разница
10. Должен быть соединен

Lesson 3

1. Read and translate the text.

The capacitor

A capacitor is an electrical device for storing quantities of electricity. The general form of a capacitor is what of two parallel conducting plates.

Such plates are of relatively large area, close together, and contain between them a non-conducting medium called the dielectric common dielectric are air, glass, oil and waxed paper.

To increase the capacitance of a capacitor the following changes can be made: first, the area of the plates may be increased.

Second, the plates may be put closer together

Third, a more suitable dielectric may be inserted between the plates.

If the plates of a capacitor are small in area and far apart, the capacitance is small. If the area is large and plates close together, the capacitance is large. The unit of capacitance, the farad, named in honour of Michael Faraday scientist a capacitance of 1 farad is very large and for practical purposes is not used. The microfarad is more convenient. Capacitors in common use today are of various kinds, sizes and shapes. Perhaps the most common is the so-called «paper capacitor» used in radios and the ignition system of automobiles another type of capacitor is the variable capacitor commonly used in tuning radios.

2. Write down new words and learn them.

1Capacitor-конденсатор

2. Capacitance-ёмкость;ёмкостное сопротивление
3. Device-прибор;устройство
4. Quantity-количество
5. Plate-пластина
6. Air-воздух
7. Glass-стекло
8. Waxed paper-пропитанная воском бумага
9. Area-площадь
10. Purpose-цель
11. To store-накапливать
12. To change-менять
13. To contain-содержать
14. To increase-увеличивать
15. To insert-вставлять
16. To be used-быть использованным
17. To be called-быть названным
18. General-обычный, основной
19. Common-общий
20. Suitable-подходящий
21. Convenient-удобный
22. Various-различный
23. Variable-изменчивый
24. Relative-относительный

Lesson 4

1. Read and translate the text.

Power Transmission

A transformer is an electrical device by which the electromotive force of a source of alternating current may be increased or decreased. They are widespread in long distance power transmitters and receivers, television. Nearly all transformers come under one of the two following classes: step-up and step-down transformers. In the transmissions of electrical energy over wires for long distance, transformers are practically indispensable.

At the power house in the distant mountains, electric current is generated by huge alternating generator at the low voltage of several thousand volts. If an attempt was made to transmit this electrical energy, at a voltage of 2,200 volts, over many miles to a distant city, the current would be so large that nearly of the energy would be consumed in heating the power line. To avoid large heat losses, transformers at the power house step the voltage up to some 220000 volts before switching the current onto the power line.

At the city end of the power line, a transformer substation steps the voltage down to its original value of 2200 volts. From there branch lines distribute the power to various section of the city where smaller transformers step it down again to the relatively safe voltage of 110 to 220 volts.

2. Write down new words and learn them.

1. A transformer-трансформер
2. A source-источник
3. A force-сила
4. A wire-провод
5. Voltage-электрическое напряжение
6. Ar attempt-попытка
7. Losses-потери
8. Substation-подстанция
9. Branch-отрасль
10. Line-линия
11. To increase-увеличить
12. To decrease-уменьшить
13. To step up-повышать напряжение
14. To step down-понижать напряжение
15. To generate-производить
16. To make-делать
17. To consume-расходовать
18. To avoid-избегать
19. To switch-включать
20. To distribute-распределять
21. Alternating-переменный
22. Widespread-широко распространенный
23. Following-следующий
24. Indispensable-совершенно необходимый
25. Distant-далекий
26. Huge-огромный
27. Various-различный
28. Relative-относительный

3.Translate words .

1. Long-distance power transmission-
2. Radio transmitters-
3. Alternating current generator-
4. Wire cable-
5. Heat losses-
6. Power line-
7. Transmission line-
8. Electrical device-
9. A huge generator-
10. Various sections-

3.  Make up new words with different suffixes.

Generate; relate; transmit; transform; receive; distant; consume; volt; differ.

4. Define the tense.

1. We have read the text about power transmission.
2. It is very difficult to translate.
3. The students are learning the new words.
4. An transformers worked well.
5. An operator will examine this electric device.
6. Branch lines distribute the power to various cities.
7. Workers built the new power station some time ago.
8. It generates the electrical energy.