PRACTICAL MATLAB® FOR ENGINEERS PRACTICAL MATLAB

14 4 Practical MATLAB® Applications for Engineers

Noband=0.2

Enter the numerical value of the fourth band, D=0.1

The fifth color band, with its numerical values are given below:

Brown=0.01

Red=0.001

Orange=0.0001

Yellow=0.00001

Enter the numerical value of the fifth band, E=0.001

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****************************R E S U L T S**************************

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The nominal value of R is 15000 ohms

The range of R (tolerance) is between 13500 and 16500 Ohms

The statistical number of failure (reliability) is 100 for every

100,000 resistors per 1000 hours of use

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The reader is encouraged to run and test the preceding program for the three color-

coded resistors, given in Table 2.3, and for any arbitrary color-coded resistance.

TABLE 2.3

Examples of Color Coded Resistors

Band 1 Band 2 Band 3 Band 4 Band 5

Yellow Red Orange Silver Yellow

Gray White Violet Gold Orange

Red Green Black No band Red

Example 2.5

Solve by hand and by using MATLAB for the energies stored in the capacitors C 1 = 1 F

and C 2 = 2 F shown in the circuit diagram of Figure 2.41 expressed in the following units:

1. Joules


2. British thermal units


3. Foot pound


4. Watt hour
   See R.2.36 for unit conversions.

ANALYTICAL Solution

The equivalent DC circuit of Figure 2.41 is redrawn in Figure 2.42

1. V

V VRRR

WCV

C

CR

C

1

22

11

10 V

V

(/( ))* ( * )/

(/ )**

21 2^10 2 10 5^4

12

+

1122

222

12 1 10 50

12 12 2 4 16

(/ )**

(/ )** (/ )**

J

WCV 22 C J

(^) 2.
W
W
1
2
Btu
Btu






50 1055 0 0474
16 1055 0 0152
/.
/.