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Given the vector potential is 16 – 12sin y j. Find the field intensity at the origin.(a) 28(b) 16(c) 12(d) 4The question was posed to me during an interview for a job.Asked question is from Magnetic Vector Potential in section Magnetostics of Electromagnetic Theory

Answer»

The CORRECT CHOICE is (c) 12

Explanation: The field intensity is given by H = – Grad(V). The gradient is given by 0 – 12cos y. At the origin, the gradient will be -12 cos 0 = -12. Thus the field intensity will be 12 units.



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