NAME: ____________________________________________
COMPUTER ELECTRONICS
END OF SEMESTER EXAM
JANUARY 12, 2013
MR. SCIAME
Directions: Answer 6 of the 7 questions. Each question is 20 points each. Max on the test is 110. Note: if you select
question 6, you MUST do parts A and B. TYPE your answers directly onto the paper.
1. Fill in the following chart based on the accompanying diagram:
P1 =
WATTS
V1 =
P2 =
WATTS
V2 =
P3 =
WATTS
V3 =
PT =
WATTS
R3 =
IT =
AMPERES
P3 =
VOLTS
VOLTS
VOLTS
% OF RT
% OF PT
2. Create a EIRP chart based on the diagram below:
T
1
2
3
4
5
E
30 V
I
R
2 k
6 k
5 k
15 k
15 k
1
P
3. Fill in the chart below based on the following information (Ignore The I1 and I2 in the diagram!) :
T
E
I
100 V
20 mA
R
1
1 k
2
8 k
3
2 k
P
4
4. Fill in the chart below based on the following information:
RL1
R1
RL2
R2
RL3
R3
IT
R4
RT
NOTE
VT = 120 V;
IB = 0.01 A
5. Based on the Wheatstone Bridge below, what will R4 be in the following situations:
R3
A
6 k
B
20 k
C
60 k
D
200 k
E
2500 k
2
R4
6. (A) Please convert the following binary numbers into base-10 numbers:
A. 00001111
B. 11100111
C. 10100101
D. 00110011
E. 00111100
6. (B) Please convert the following values to binary numbers.
A. 27
B. 52
C. 100
D. 175
E. 248
Extra Credit: 2013
7. In the diagram below, what are the values of RTH and VTH?
PORTFOLIO QUESTION ON NEXT PAGE →
3
PORTFOLIO QUESTION
In the Diagram below, construct a EIRP chart for the following instances:
A. RL = 10 Ω
B. RL = 5 Ω
C. RL = 30 Ω
Find % efficiency in all cases. Which resistance gives maximum efficiency?
4