4. Make up questions and answer them. Work in pairs:

1) if electricity is a form of energy;

2) if there are two types of electricity;

3) if alternating voltage can be increased and decreased;

4) if Franklin made an important contribution to the science of electricity;

5) if Ampere determined the difference between the current and the static charges;

6) If the electric current can flow through liquids and through gases;

7) if the electrolytes change greatly when the current passes through them;

8) if a negatively charged electron will move to the positive end of the wire.

5. Explain why:

1. static electricity cannot be used to light lamps, to boil water, to run electric trains and so on;

2. voltage is increased and decreased;

3. the unit of electric pressure is called the Volt;

4. students must learn English;

5. the flow of moving electrons is a form of the electric current;

6. Ampere was wrong as to the current direction;

7. the current is said to flow from the positive end of the wire to the negative end.

5. Define the meaning of the following words:

battery, alternating current, direct current, static electricity, electric current, wire, laboratory, terminal, electron.

7. The following statements are not true to fact. Correct them:

1. Electrons flow from the positively charged terminal of the battery to the negatively charged terminal. 2. Ampere supposed the current to flow from the negative pole to the positive. 3. Static electricity is used for practical purposes. 4. Static electricity is not very high in voltage and it is easy to control. 5. To show that the charges are unlike and opposite Franklin decided to call the charge on the rubber positive and that on the glass negative. 6. Galvani thought that electricity was generated because of the contact of the two dissimilar metals used. 7. Volta took great interest in atmospheric electricity and began to carry on similar experiments. 8. The direct current is known to flow first in one direction and then in the opposite one. 9. The direct current used for power and lighting purposes is assumed to go through 50 cycles a second.

8. Give headings to each paragraph of the text.

9. Put two questions to each paragraph of the text. Ask your partner to answer them.

10. Give an abstract of the text. Библиографический список

1. English Grammar An Intermediate Reference and Practice Book, Digby Beaumont, Colin Granger Macmillan Education. – 2006. – 352 p.

2. Krylova I.P. A Grammar of Present-Day English / I.P. Krylova, E.M. Gordon. – M.: KDY, 2005. – 448 p. – на английском языке.

3. Куклина И.П. Energy is the source of Life: пособие по англ. языку / И.П. Куклина. – СПб.: КАРО, 2000. – 512 с.

4. Allan D.J. «Power transformers – the second century» / D.J. Allan // Power Engineering Journal, 2006. – 72 p.

5. Grigsby. The Electric Power Engineering Handbook / Grigsby, L. Leonard. – USA.: 2001.

6. Encyclopaedia Britannica Deluxe Edition.

Редактор – Ю.Ю. Аптрашева

Компьютерная верстка – Т.А. Бурдель

ИД № 06039 от 12.10.2001

Свод. темплан 2010 г.

Подписано к печати 21.06.2010. Бумага офсетная. Формат 60×84 1/16.

Отпечатано на дупликаторе. Усл. печ. л. 2,0. Уч.-изд. л. 2,0.

Тираж 100 экз. Заказ 423.

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