Department: Comm., Mech, Cont. & Bio
Academic Year: 2020 - 2021
Lecturer : Dr. Salah Alian
Subject : Electrical Circuits
Semester: Fall
Sheet No: III
Circuit Passive Transformations
3.1. Convert the delta connected resistor bank shown in fig.(a) into an equivalent star
connected resistor bank.
3.2. Calculate the input resistance between terminals a and b given in the circuit of fig.(b).
3.3. Determine the current delivered by the 220-V DC source to the circuit shown in fig.(c)
a
a
a
R1
R2
50
6
6
30
6
c
20
220V
c
d
b
d
5
3
24
6
6
c
b
b
Fig.(a)
Fig.(b)
Fig.(c)
3.4. In the circuit shown in fig. (d), compute for the current in the 5 resistor.
3.5. Determine the current drawn by the circuit shown in fig. (e).
3
5
5
3
3
3
4
2
3
50V
6
2
2
36V
Fig.(d)
Fig. (e)
6
3.6. Using source transformation,
compute for the power delivered
by the 50V voltage source in the
circuit shown in the adjoin figure.
5
3
10A
2
50V
10V
10
3.7. Using the delta/star transformation,
calculate the current in each branch of
the circuit shown in the adjoin figure.
5
50V
25V
3
4
4
I
3.8. Using the stat/delta transformation
determine the current I in the circuit
shown in the adjoin figure.
12V
4
12V