# EE 233 Network Analysis I Assignment 3 – Series, Parallel,

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EE 233 Network Analysis I

Assignment 3 – Series, Parallel, Δ-Y & Y-Δ

Due October 1st (Thursday)

1)

a) Find the no-load value of vo in the in the circuit shown.

b) Find vo when RL is 300 kΩ.

c) How much power is dissipated in the 50 kΩ resistor if the load terminals are

accidentally short-circuited?

d) What is the maximum power dissipated in the 150 kΩ resistor? ( 5 Points )

2) Find the equivalent resistance Rab for the following circuit. ( 5 Points )

3) Find the current and power supplied by the 80V source in the circuit by replacing

the lower Δ ( R4, R5 and R6 ) with its equivalent Y. The values of the resistors are

given below. ( 5 Points )

R1 = 20 Ω R4 = 60 Ω

R2 = 150 Ω R5 = 100 Ω

R3 = 250 Ω R6 = 80 Ω

50 kΩ

150 kΩ

400 V

50 Ω 56 Ω 60 Ω

100 Ω

20 Ω

48 Ω 80 Ω

40 Ω

32 Ω

36 Ω

120 Ω

vo R L

4) From the given above circuit ( In Q.3 ), Find the current and power supplied by an

80V source in the circuit by replacing Y on the right ( R3, R4 and R6 ) with its

equivalent Δ. ( 5 Points )

Extra Credit (5 Points)

5)

a) Find the equivalent resistance Rab in the circuit by using a Y-to-Δ

transformation involving resistors R2, R3, and R5.

b) Repeat (a) using a Δ-to-Y transformation involving resistors R3, R4, and R5.

80 V

26 Ω

50 Ω

100 Ω

100 Ω

60 Ω

40 Ω

14 Ω