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Find the magnetic field intensity when the magnetic vector potential x i + 2y j + 3z k.(a) 6(b) -6(c) 0(d) 1I got this question in a national level competition.My question comes from Magnetic Vector Potential in division Magnetostics of Electromagnetic Theory

Answer»

The correct choice is (b) -6

Easiest explanation: The magnetic FIELD intensity is given by H = -GRAD(Vm). The gradient of Vm is 1 + 2 + 3 = 6. Thus H = -6 units.



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