III. Translate and retell the following text

A device for converting mechanical energy into electric energy is called a generator. The enormous energy of steam engines, gas engines and water turbines can now be transformed into electricity and transmitted many miles. The essential parts of a generator are: a) the magnetic field, which is produced by permanent magnets or electromagnets, and b) a moving coil of copper wire called the armature wound on a drum.

IV. Transform active voice in passive according to model Model: 1) Electronic devices have revolutionized life.

2) Life has been revolutionized by electronic devices.

1. Our engineers have developed many new devices.

2. Mendeleyev observed interesting regularities in the properties of elements.

3. We use boilers for many purposes.

4. We frequently cannot bum fuels completely.

5. The application of electronics is changing the entire life of people.

V. Transform passive voice in active according to model Model: 1) Human-like thinking is done by electronics.

2) Electronic does human-like thinking. 1. A now phenomenon of electricity was discovered by Edison.

2.Computer are used by engineers in all the branches of economy.

3. Considerable scientific and technical progress has been achieved by our people.

4. Large atomic power stations are being constructed by the engineers in the USSR.

VI. Find in the text and translate sentences with it word-combinations

are insulated from; rise and fall occurs endlessly; are in serious; a smooth current is desirable; arc soldered to semicircular.

VII. Define forms and functions of an infinitive and translate offers into Russian

1. То understand many parts of electronics, we must know electricity behaves at higher frequencies.

2. To build up a magnetic field requires the expenditure of a certain amount of energy.

3. This method of voltage was the first to be used in connection with synchronous converters.

4. The purpose of the microphone is to convert the sound pressure into electrical impulses of varying amplitude.

5. The Sun and many other heavenly bodies have been discovered to emit radio signals.

6. Something seems to be limiting the amount of electron flow.

7. The output voltage of the amplifier is directly proportional to the distance to be measured.

8. The direction of the lines is assumed to be from positively charged body to the negatively charged body.

9. Clouds at the receiving station seem to cause strange signals.

VIII. Answer the following questions.

1. What does between south and north poles exist?

2. How is the voltage generated in the wire?

3. When do voltage and current rise and fall in the conductor?

4. What is the construction of the simple generator?

5. How does the current flow out into the external circuit?

6. What does one do to obtain a smooth current?