For the electric circuit of Example 6, find how long it takes the current to reach 0.1
Question:
For the electric circuit of Example 6, find how long it takes the current to reach 0.1 of the initial value of 0.750 A.
Data from Example 6
The electric current i in a circuit containing a resistance and an inductance (see Fig. 13.18) is given by ln(i/I ) = −Rt/L, where I is the current at t = 0, R is the resistance, t is the time, and L is the inductance. Calculate how long (in s) it takes i to reach 0.430 A, if I = 0.750A, R = 7.50Ω ,and L = 1.25H. Solving for t and then evaluating, we have
Therefore, the current changes from 0.750 A to 0.430 A in 0.0927 s.
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Related Book For
Basic Technical Mathematics
ISBN: 9780137529896
12th Edition
Authors: Allyn J. Washington, Richard Evans
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