GATE EE 2019 Set 1 — Question 22
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Electric Circuits → Transient & AC Steady-State → Transient Response (DC & AC)
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Question
In the circuit shown below, the switch is closed at . The value of in degrees which will give the maximum value of DC offset of the current at the time of switching is
Correct answer
(B) -45
Solution
In an circuit with a sinusoidal source , the current is:where and .The term is the transient component, and its initial value is the DC offset. The DC offset is maximum when , which occurs when .Given:
mH H
rad/s
For maximum DC offset:
or .From the given options, is the correct answer.
mH H
rad/s
For maximum DC offset:
or .From the given options, is the correct answer.
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