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Find the work done in an inductor of 4H when a current 8A is passed through it?(a) 256(b) 128(c) 64(d) 512I have been asked this question in an interview.The origin of the question is Magnostatic Energy in chapter Magnetostics of Electromagnetic Theory

Answer»

Right choice is (b) 128

Explanation: The WORK done in the INDUCTOR will be W = 0.5 x LI^2. On substituting L = 4 and I = 8, we get, W = 0.5 x 4 x 8^2 = 128 units.



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