Engineering Board Exam Reviewer · Time Response of Reactive Circuits · medium
The switch in the RL circuit shown closes at t=0 with no initial current (V=24 V, R=40, , L=4 H). Find the current at t=100 ms.
- 0.221 A
- 0.379 A
- 0.6 A
- 0.236 A
Answer
B. 0.379 A
Solution
=L/R=100 ms. i=V/R≤ft(1-e-t/ )= 24 V40, ≤ft(1-e-100 ms/100 ms )=0.379 A.
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