Question

Determine the voltage across the inductor in the circuit shown below is? (a) VL = 60(-e^-2t)V (b) VL = 60(e^2t)V (c) VL = 60(e^-2t)V (d) VL = 60(-e^2t)V I have been asked this question in unit test. This intriguing question comes from DC Response of an R-L Circuit topic in section Transients of Network Theory Select the correct answer from above options network theory questions and answers, network theory questions pdf, network theory question bank, network theory gate questions and answers pdf, mcq on network theory pdf, gate network theory questions and solutions, network theory mcq Test , ies network theory questions, Network theory Questions for GATE EC Exam, Network Theory MCQ (Multiple Choice Questions)

Answer 1

The correct answer is (c) VL = 60(e^-2t)V Easy explanation: Voltage across the inductor VL = Ldi/dt. On substituting the expression of current we get voltage across the inductor = 15×(d/dt)(2(1-e^-2t)))=60(e^-2t)V.