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Find the electric field when the magnetic field is given by 2sin t in air.(a) 8π x 10^-7 cos t(b) 4π x 10^-7 sin t(c) -8π x 10^-7 cos t(d) -4π x 10^-7 sin tI had been asked this question in an internship interview.This intriguing question comes from Magnetic Field Intensity topic in chapter Magnetostics of Electromagnetic Theory

Answer»

Right CHOICE is (a) 8π x 10^-7 cos t

The BEST I can explain: Given H = 2sin t. We GET B = μH = 4π x 10^-7 x 2sin t = 8πx10^-7sin t.

To get E, integrate B with respect to time, we get 8πx10^-7cos t.



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