Introduction to Electric Circuits

(b)

Ii1.1 -101 -51 -31 Xlyl - I6~1

7.6 Problems 169

4 Find the determinant ~ the matrix I34 58]

5 Evaluate the determinant of the matrix

A Ii

6 Write down and evaluate the minor of the element a2~ of the matrix A in
Problem 5.

7 Write down and evaluate the cofactor of the element a32 of the matrix A in
Problem 5.
NB" Each of the following problems should be solved using (a) nodal
voltage analysis and (b) mesh current analysis even though in some cases
other methods might be more appropriate.

8 Determine the value of the current 1 through the 1 f~ resistor in the circuit
of Fig. 7.15.

2s 3~

! 1 i I

Figure 7.15

10v~

E] ,~ c

t'

5V

9 Calculate the value of the current flowing in the resistor R (- 30 f~) in the

circuit of Fig. 7.16

,sA t

L

Figure 7.16

1~ 6~

i !- ..... ---!!

--J 2~ R ['-~30~ 12~[~ 18V