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Home > Ordnance Documents and other related manuals > > Figure 38. Solution for Universal Time Constant Problem.
Universal Time Constant Chart. - Continued
Capacitors in Series and Parallel

Electronic Principles
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ELECTRONIC PRINCIPLES - OD1647 - LESSON 1/TASK 1
FIGURE 38. SOLUTION FOR UNIVERSAL TIME CONSTANT PROBLEM.
two one hundredths), then the time required to reach one RC time
constant must be equal to:
.22 RC = 100 microseconds
1 x 100 microseconds
RC = ­­­­­­­­­­­­­­­­­­­­­
.22
100 microseconds
RC = ­­­­­­­­­­­­­­­­­
.22
RC = 454.54 microseconds (rounded to
455 microseconds)
RC = 455 microseconds
Now use the following formula to find C:
R C
C = _­­­
R
455 microseconds
C = ­­­­­­­­­­­­­­­­
20,000 Ohms
C = 0.0227 microfarads
C = 0.023 microfarads
To summarize the above procedures, the problem and solution are
shown below without the step­by­step explanation.
60






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