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X. Use the verb in parentheses in the correct form with the appropriate preposition. Translate the sentences into Russian.

  1. N-type semiconductors …. extra electrons. (characterize)

  2. The output circuit …. electrodes at the emitter and collector. (connect)

  3. The voltage at the base electrode … the input current. (control)

  4. The conductivity of the transistor … the voltage at the base electrode. (determine)

  1. Musicians design variations that affect power rating, impedance and fidelity. (fascinate)

XI. Fill in the gaps in the sentences using the correct form of the word in parentheses:

  1. Semiconductors are materials with ... ability to conduct electric current, (vary)

  2. The process of ... impurities is known a doping. (add)

  3. The goal of our work is to avoid .... (distort).

  4. Our ear picks up ... in air pressure and translates them into electrical signals. (fluctuate)

  5. The voltage at the base electrode determines the ... of the transistor. (conduct)

  6. The advertising campaign is intended .. sales of a new type of amplifiers. (boost)

  7. Leave the battery on ... all night. (charge)

  8. We need two amplifiers ... in fidelity for comparison. (differ)

XII. Look through text 5 a again. Give main points of each passage. Use “is / are about …”. See Model. Make an annotation of the text (See appendix, lang. Learn. Focus, p.118)

Model: The first passage of the text is about …

The facts presented in the second (third) passage are about…

XIII. Divide into groups of 3 or 5 students. In your group prepare a presentation of a new product with speakers (television, hi-fi system, home theatre, CD player, computer, etc.) you’ve recently seen or bought. The following plan and the words can be of help to you:

high fidelity flat display

perfect reproduction good power rating

precise copy top-of-the-line amplifier

simple installation advanced microprocessor

modern version high sound quality

well-designed amazing piece of technology

cause no distortion reasonable piece

the latest model

introduce sb. to smth.

We’d like to present smth. to sb.

show sb. smth.

X can be used for … It is made of …

is extremely necessary when you … It consists of …

The main advantages, selling points, strengths of X are …

Grammar Exercises (The Infinitive. The Functions of the Infinitive. The Infinitive Construction. The Complex Object. The complex Subject. See APPENDIX, GR. REF., p. 107-110)

XIV. Translate the following phrases from English into Russian.

1. the data to be obtained; 5. the suggestions to be considered;

2. the problem to be discussed; 6. the information to be processed;

3. the power to be increased; 7. the device to be used;

4. the hole to be formed; 8. the measurement to be completed.

XV. Underline the Infinitives in the sentences. Define their func-tions. Translate the sentences into Russian.

  1. To magnetize a body requires some energy.

  2. In order to build the power plant near Northfield (USA) three miles of tunnels were drilled.

  3. The distance to be covered was equal to ten miles.

  4. To reduce the power losses, thick wires should be used.

  5. No additional components were used since they were not needed to actuate the relay.

  6. Various installations were used in order to transform electric power into mechanical, heat, and chemical power.

  7. At least 90 per cent of electric energy to be penetrated at present is a.c.

  8. A.c. can be increased, or decreased to meet industrial requirements.

  9. Gas turbines can be started within minutes, while steam plants may require house to be put into operation.

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