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

For the circuit shown,

• R₁ = 1.5 kΩ
• R₂ = 5.6 kΩ
• R₃ = 1.8 kΩ
• L = 150 mH

For the RL circuit, the source has been at an initial voltage value of V_i = -15 V for a long time.
At t = 0, the source voltage abruptly jumps to V_f = 20 V.

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

Answer