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Transcript
```King Fahd University of Petroleum and Minerals
Department of Electrical Engineering
EE 201 Electric Circuits I,
Major Exam I
Monday, 19 March 2007
6:30 pm – 8:00 pm
Name:
ID:
Section:
Instructor: Dr. Yahya Al-Harthi
Problem
Score
1
2
3
Total
Good luck!
Out of
1.
Find the equivalent resistance
Rab for the following circuit.
1
2
1
1
3
3
5
2
6
3
a
b
1
4
10
9
2.
Ali has four devices (A, B, C, and D) which should sit on the board and be connected to the
voltage source to function. These devices have the following specifications:
 Internal resistors: RA  RB  RC  RD

Needed Voltages:
VA  2VB  VC  2VD  VS
(a) Draw the connection of these devices (assume the devices are square boxes).
(b) If VS  10V and RB  2 , what is the value of the current going through device B?
Vs
board
3.
For the circuit shown below:
(a) Use mesh-current analysis to write the equations of the currents given the speakers' internal
resistors are: R1 , R2 , R3 , and R4 .
(b) If R1  R2  R3  R4  2 , I 2  1 A , and Vs  2 V find the values of the currents.
(c) If we want to replace the voltage source with a current source while still keeping the values
of the currents in part (b), what should be the value of this current source?
1
Vs
2
Is
DC
3
4
```