FACULTY OF HEALTH AND APPLIED SCIENCES
DEPARTMENT OF NATURAL AND APPLIED SCIENCES
Electrical Circuit and Electronics (ECE602S) ASSIGMENT 1 (15 Marks)
1.1 A bridge circuit is shown in Figure 1. With the currents as marked, write
(a) Kirchhoff's current law at the four nodes and
(b) Kirchhoffs voltage law around the loops abda, bcdb, and adca.
b
I2
R1
R2
i1
I5
a
c
R5
I3
I4
I
d
E
Figure 1. Bridge Circuit
1
2.1 For the bridge network shown in figure 2, find the current in the 5 Ω resistor, and its direction, by
using Thevenin’s theorem.
4Ω
3Ω
6.6 V
A
B
5Ω
6Ω
2Ω
Figure 2. Bridge Network
2.2 Determine the current flowing in the 6 Ω resistor of the network shown in figure 3, by using Norton’s
theorem.
2Ω
8Ω
4Ω
10 Ω
6Ω
2
6 mA
3.1 Determine, by successive conversions between Thevenin and Norton equivalent networks, a
Thevenin equivalent circuit for terminals AB of figure 4. Hence determine the current flowing in a 6 Ω
resistor connected between A and B.
2A
A
4Ω
4V
10 V
15 V
2Ω
3Ω
20 Ω
B
Figure 4. Circuit Equivalent Network
3