Вопрос № 223115 - Английский язык

Прочитайте текст и заполните пропуски подходящими по смыслу словами
Thermionic emission is the most important and one most commonly used in electron 1_______________. In this method 2________________ is heated, resulting in increased thermal or kinetic energy of the unbound electrons. Thus, a greater number of electrons will attain sufficient speed and energy 3________________  from the surface of the emitter. The number of electrons released per unit area of an emitting surface is related to the absolute temperature
of the cathode and a quantity of the work must perform when escaping from the emitting surface.

Прочитайте текст и заполните пропуски подходящими по смыслу словами
Thermionic emission is the most 1_______________and one most commonly used in electron tubes. In this method 2________________ is heated, resulting in increased thermal or kinetic energy of the unbound electrons. Thus, a greater number of electrons will attain sufficient speed and energy 3________________  from the surface of the emitter. The number of electrons released per unit area of an emitting surface is related to the absolute temperature
of the cathode and a quantity of the work 4_______________must perform when escaping from the emitting surface.

Прочитайте текст и заполните пропуски подходящими по смыслу словами
When 1__________________ electrons suddenly strike a metallic 2_______________ they give up their kinetic 3_________________ to the electrons and atoms which they strike. Some of the bombarding electrons collide directly with free 4_________________ on the metal surface and may knock them out from the surface. The electrons freed in this way are known as secondary emission electrons, since the primary electrons from some other source must be available to bombard the secondary electron-emitting surface.

Прочитайте текст и заполните пропуски подходящими по смыслу словами
We are finally ready to apply the knowledge we gained in previous sections about electrons, vacuum 1_________________ and transistors to some practical matters. In the following sections we shall consider a variety of circuits employing electron tubes and transistors. Circuits are 2_________________ of tubes or transistors with other components, such as resistors, capacitors and inductors, and form the 3________________ building blocks of electronic systems: radio, automatic computer and so on. To understand the systems, you must be familiar with the circuits that 4_______________ them up.

Прочитайте текст и заполните пропуски подходящими по смыслу словами
Now we shall discuss amplifier 1________________, or more specifically, audio amplifiers. An amplifier is an electron tube or transistor circuit, which 2_________________ up an ac signal applied to its input. It is called a voltage amplifier if the magnitude of the output 3__________________ from the amplifier is considerably greater than that of the input voltage. As a matter of fact the ratio of the output voltage to the 4__________________ voltage is called the amplification or gain of the amplifier.

Прочитайте текст и заполните пропуски подходящими по смыслу словами
There are 1_______________ power amplifiers. These are similar to voltage amplifiers, except that their main 2__________________ is to supply a considerable amount of 3________________ i. e. voltage times current to the output or load 4________________, although the ac input signal may not draw any grid current and, hence, the input power may be zero.