Irwin, Basic Engineering Circuit Analysis, 11/E 1
Chapter 01: Basic Concepts Problem 1.1
SOLUTION:
1.1 If the current in an electric conductor is 2.4 A, how many coulombs of charge pass any point in a 30-second interval?
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Engineering Circuit Analysis: Chapter 1 Solved Problems, Study Guides, Projects, Research of Engineering
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SOLUTION:
1.1 If the current in an electric conductor is 2.4 A, how many coulombs of charge pass any point in a 30-second interval?
SOLUTION:
1.2 Determine the time interval required for a 12-A battery charger to deliver 4800 C.
SOLUTION:
1.4 If a 12-V battery delivers 100 J in 5 s, find (a) the amount of charge delivered and (b) the current produced.
SOLUTION:
1.5 The current in a conductor is 1.5 A. How many coulombs of charge pass any point in a time interval of 1.5 minutes?
SOLUTION:
1.7 Determine the number of coulombs of charge produced by a 12-A battery charger in an hour.
SOLUTION:
1.8 Five coulombs of charge pass through the element in Fig. P1.8 from point A to point B. If the energy absorbed by the element is 120 J, determine the voltage across the element.
B
A
Ȃ
V 1
Figure P1.
SOLUTION:
1.10 The charge entering the positive terminal of an element is q ( t ) = − 30 e −^4 t^ mC. If the voltage across the element
is 120 e −^2 t^ V, determine the energy delivered to the element in the time interval 0 < t < 50 ms.
SOLUTION:
1.11 The charge entering the positive terminal of an element is given by the expression q ( t ) = − 12 e −^2 t^ mC. The
power delivered to the element is p ( t ) = 2.4 e −^3 t^ W. Compute the current in the element, the voltage across the
element, and the energy delivered to the element in the time interval 0 < t < 100 ms.
SOLUTION:
1.13 The power absorbed by the BOX in Fig. P1.13 is 2 e −^2 t^ W. Calculate the amount of charge that enters the BOX
between 0.1 and 0.4 seconds.
4 e Ȃ t^ V Ȃ BOX
Figure P1.
SOLUTION:
1.14 The power absorbed by the BOX in Fig. P1.14 is 0.1 e −^4 t^ W. Calculate the energy absorbed by the BOX during
this same time interval.
10 e Ȃ^2 t^ V Ȃ BOX
Figure P1.
Problem 1.15 Chapter 01: Basic Concepts
SOLUTION:
1.16 The charge that enters the BOX in Fig. P1.16 is shown in the graph below. Calculate and sketch the current flowing into and the power absorbed by the BOX between 0 and 10 milliseconds.
12 V Ȃ BOX
i ( t ) (^) q ( t ) (mC)
t (ms)
1
2
3
Ȃ 2
Ȃ 3
Ȃ 1
1 2 3 4
5 6 7 8 9 10
Figure P1.
SOLUTION:
1.17 The energy absorbed by the BOX in Fig. P1.17 is given below. Calculate and sketch the current flowing into the BOX. Also calculate the charge which enters the BOX between 0 and 12 seconds.
10 V Ȃ BOX
i ( t ) (^) w ( t ) (J)
t (s)
5
Ȃ2.
1 2 3 4 5
6 7 8 9
10 11
12
Figure P1.