My speciality. Овчинникова Т.Е - 18 стр.

       2.4.5 Find a sentence with the word “one”, define its function (paragraph
1); sentences with should, define its function and translate into Russian
(paragraph2) ; identify parts of speech and functions of the words with the suffix
-ing (paragraph 4)

                COMPONENTS OF CURRENTS AND VOLTAGES

1.In most tube applications the plate current, grid voltage, and plate voltage are not
constant but vary with time between maximum values, as shown in Figure 6.
2. It is helpful to consider that such a current or voltage is composed of a D.C. or
average component together with an A.C. or varying component of peak value or
effective value. In all but a ew cases the A.C. component is the one which is of certain
interest, but it should be noted that the D.C. component is necessary, since this
ermines the portion of the tube characteristics in which the operation takes place. It
should also be noted that the average value may change when a signal is applied.
3. A typical instance is given in Figure 7, which shows a triode tube with external
resistance R in its plate circuit. E is an alternating voltage, the signal, which
causes the instantaneous grid potential to fluctuate up and down about its average
value. The plate current will vary correspondingly.
4. This current in flowing through the load resistance R produces varying amounts of
IR drop, and corresponding variations in plate potential will take place. It should be
noted that the average or D.C. component of plate potential is less than the B-supply
voltage E by the D.C. component of drop in the load resistor R. Then A.C.
components of plate current and plate potential combine to give the useful output of
the iube.




Figure 6-Compontnts of Plate Current   Figure 7-Triode wiht Resistanse Load

       2.4.6 Translate the word-combinations

a) tube application, peak value, load resistor;
b) in all but a few cases; in all but few cases; it should be noted; the
plate current will vary correspondingly.

       2.4.7 Answer the questions

Are the plate current, grid voltage, and plate voltage constant in most
 tube applications? 2. Why is the D.C. component necessary? 3. What
a typical instance does Fig. 7 show?