EE 201 Circuits G. Tuttle

RL transient practice problems
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Read the RL-transient class notes.


For the circuit shown,

  • R = 27 Ω
  • L = 100 μH

For the RL circuit, the source has been at an initial current value of Ii = 15 mA for a long time.
At t = 0, the source current abruptly drops to If = -10 mA.

Determine the expression for the inductor current as a function of time, for t > 0.

Calculate the time when the inductor current will be equal to -5.83 mA and calculate the inductor voltage at that time.

Answer