Английский "Радиотехника"

B.In case high frequencies should he passed, I’ll use a high-pass filter, while in case low frequencies should he passed I’ll use a low-pass filter.

A.Quite right. Draw a diagram of a high-pass filter, please. What does it consist of? (Fig. 6).

B.It consists of a condenser and an inductance coil.

A.Describe the operation of this device.

B.The condenser passes currents of high frequencies and prevents the flow of low frequencies.

Fig. 6

A.Right you are. And what’s the function of an inductance coil?

B.It is used as a bypass. It bypasses low frequencies back to the source.

A.Quite right. Thank you for your information.

Задание 3. Закончите предложения, выбрав из предложенных вариантов один, соответствующий содержанию текста.

1. A filter is used a) in order to introduce pulsations; b) in order to separate low frequencies from high frequencies. 2. A filter consists of a) a resistor and a transformer; b) a condenser and a choke coil. 3. Direct current easily passes a) through a choke coil; b) through a condenser. 4. A low-pass filter is used a) to prevent the flow of low frequencies; b) to present the flow of high frequencies. 5. In a high-pass filter а) an inductance coil is used as a bypass; b) a condenser is used as a bypass.

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Задание 4. Ответьте на вопросы к тексту.

1. What is a filter used for? 2. What does a filter consist of ? 3. Can direct current flow through the condenser of Filter A ? 4. What filters are described in this text? 5. What filter will you use for passing low frequencies? 6. What elements does a low-pass filter consist of? 7. What is the function of a condenser in a low-pass filter? 8. What is the difference between a low-pass filter and a high-pass filter?

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Оглавление
Задание I………………………………………………..….. 3
Text A. Radio-Transmission...........................................	4
Text B. Radio Waves and Radio Communication........	10
Задание II.............................................................................	11
Text A. On the Development of Radio...........................	12
Text B. Faraday and Maxwell.......................................	17
Задание III............................................................................	18
Text A. Electricity and Magnetism................................	19
Text B. Magnets and Electrical Current………………. 24
Задание IV............................................................................	26
Text A. Main Components of a Circuit..........................	27
Text B Conductors and Insulators..................................	33
Задание V..............................................................................	34
Text A. Capacitance and Capacitors...............................	35
Text B. Capacitance and Capacitors...............................	39
Задание VI.............................................................................	41
Text A. Inductance and Inductors...................................	41
Text B. Transformers......................................................	45
Задание VII............................................................................	47
Text A. Filters..................................................................	47
Text B. Filter “А”, Filter “B”, Filter “C”…..…………... 51

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