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Find the power, given energy E = 2J and current density J = x^2 varies from x = 0 and x = 1.(a) 1/3(b) 2/3(c) 1(d) 4/3I have been asked this question in an internship interview.This interesting question is from Stokes Theorem topic in section Vector Calculus of Electromagnetic Theory

Answer»

Right option is (B) 2/3

The best I can explain: From STOKE’s theorem, we can calculate P = E X I = ∫ E. J ds

= 2∫ x^2 DX as x = 0->1. We get P = 2/3 units.



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