UNIVERSITY OF MASSACHUSETTS DARTMOUTH
COLLEGE OF ENGINEERING
EGR 101 INTRODUCTION TO ENGINEERING I
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This assignment is due Thursday, October 18, 2012.
Use engineering papers.
Show all of your steps.
Present your work neatly and clearly.
Box your final answers.
Problem 1:
Consider the following circuit that consists of multiple series-aiding and series-opposing
batteries, which power a resistance of 10k .
 Indicate whether point A is at higher or lower potential than point B, and explain why.
 Reduce the circuit to a single battery with a net voltage equivalent to the algebraic sum
of all the voltages in the original circuit.
 Show the proper polarity of the battery at points A and B; and
 indicate which way the conventional current flows.
 Calculate the current in mA.
 Calculate the power provided by the battery in mW.
Problem 2:
Problem 25 pg 94.
Problem 3:
Problem 13 pg 93. Use information in section 2.3.5 on pg 56 in text
Problem 4:
Problems 6b, d, f on p. 73 strictly by the resistor color code as shown in Figure 2.10 on p. 52.
Problem 5:
Problems 8b, e, g on p. 74 strictly by the resistor color code as shown in Figure 2.10 on p. 52.
Problem 6:
Complete the chart in problem 21 on p. 94.
Current
10 mA
Voltage
Resistance
32 V
3.3 kΩ
15 mA
24 mA
45 V
1.2 kΩ
Power
4W
16 mW
231 mW