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Applications of Differential Equations

Electric Circuits

Exercises to Work by Yourself

Exercise D

(continued from last page...)

Now try this one. Assume the following parameters:

  • inductance of 1 henry
  • resistance of 2 ohms
  • capacitance of 1/4 farad

With initial conditions:

  • I(0) = 0 amperes
  • q(0) = 0 coulombs

The voltage source is now oscillating, according to the formula:

  • E(t) = 50 cos t volts

Don't forget to use:

I'(0) = (E(0) - R I(0) - q(0)/C) / L

again to "fix" your initial conditions.

Use sol5 as the solution variable this time, plot on the interval 0 ≤ t ≤ 15, and make the plot blue.

Let's go see what you should have gotten...

Compass If you're lost, impatient, want an overview of this laboratory assignment, or maybe even all three, you can click on the compass button on the left to go to the table of contents for this laboratory assignment.

ODE Laboratories: A Sabbatical Project by Christopher A. Barker

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