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Energy and Electronics (Atroshkina A.A.,etc.).doc
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IX. Read the definitions below and guess what word is defined in each case.

  1. an electronic device constructed of three layers of alternating types of doped semiconductor (P-N-P and N-P-N);

  2. a substance that allows some electric current to pass through it arid is used in electronic equipment for this purpose;

  3. to increase something such as production, sales, voltage because they are not as high as you want them to be;

  4. the quality of not changing something when you are producing it again in a different form, by recording, translating, etc.;

  5. one of the 2 points at which electricity enters or leaves a battery or other piece of electrical equipment;

  6. combined resistance to alternating and direct current.

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 …

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