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Find the power of an inductor of 5H and current 4.5A after 2 seconds.(a) 25.31(b) 50.62(c) 102.4(d) 204.8I had been asked this question during an interview for a job.My doubt is from Magnostatic Energy topic in portion Magnetostics of Electromagnetic Theory

Answer»

The CORRECT OPTION is (a) 25.31

Explanation: The energy stored in an inductor is given by E = 0.5 LI^2. Thus, put L = 5 and I = 4.5 and we GET E = 0.5 x 5 x 4.5^2 = 50.625 UNITS To get power P = E/t = 50.625/2 = 25.31 units.



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