Электрическая цепь

For the electrical circuit, the diagram of which is shown in Fig.1-51, as per

resistances set in Table 1 and e.m.f. do the following:

1) to draw up a system of equations necessary for determining currents under the

first and second Kirchhoff laws; (0.5 p)

2) find all currents using the nodal mesh analysis method; (1 p)

3) Check the correctness of the solution by applying the nodal voltage method.

Simplify the scheme by replacing the triangle of R4 resistances, R5, R6 an

equivalent star. Draw a calculation scheme with an equivalent star and show

points on it; (1 p)

4) determine current in resistor R6 by means of equivalent generator methods;

(1 p)

5) determine the voltmeter readings and draw up a power balance for the given

scheme; (0.5 p) 1 p

6) Scale a potential diagram for the outer loop. (1 p)

E1=72V, E2=12V, E3=4V, R01=0.7, R02=1.5, R1=6, R2=1, R3=10, R4=4, R5=12, R6=4.