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Find the magnetic flux density of the material with magnetic vector potential A = y i + z j + x k.(a) i + j + k(b) –i – j – k(c) –i-j(d) –i-kThis question was posed to me by my school principal while I was bunking the class.Asked question is from Magnetic Field Density in portion Magnetostics of Electromagnetic Theory

Answer»

Right option is (b) –i – j – k

For explanation I WOULD say: The magnetic flux density is the curl of the magnetic vector POTENTIAL. B = Curl(A). THUS Curl(A) = i(-1) – j(1) + k(-1) = -i – j – k. We get B = -i – j – k.


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