GATE EE 2024 Set 1 — Question 14
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Electric Circuits → Transient & AC Steady-State → First-Order RL & RC
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Question
The circuit shown in the figure with the switch open, is in steady state. After the switch is closed, the time constant of the circuit in seconds is
Correct answer
(A) 1.25
Solution
To find the time constant , we deactivate the independent current source (open circuit) and close the switch . The circuit then consists of resistors and inductors. By calculating the equivalent resistance and inductance seen by the energy storage elements in the resulting network, the time constant is found to be 1.25 seconds.
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