Question

For a series RL circuit having L = 5 H, current = 1 A (at an instant). The energy stored in magnetic field is ___________ (a) 3.6 J (b) 2.5 J (c) 1.5 J (d) 3 J The question was posed to me during an interview. My question comes from Advanced Problems on Network Theorems topic in division Useful Theorems in Circuit Analysis 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

Correct choice is (b) 2.5 J Easiest explanation: We know that, Energy, E = 0.5 LI^2 Or, E = 0.5 X 5 X 1^2 = 2.5 J.