EE 201 Circuits G. Tuttle

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


For the circuit shown,

  • R = 15 Ω
  • L = 33 μH
  • IS = 2.5 A

For the RL circuit, the switch has been open for a long time, and it closes abruptly at t = 0.
Prior to the switch closing the inductor current was zero.

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 1.88 A and calculate the inductor voltage at that time.

Answer