Q39. In a cartesian system, vector magnetic potential at a point (xV.z) is defined as A = 4x ya, +2y ra, - 3xyza, b/m The magnetic flux density at point (1, 1, 0) will be -4az 2az -3ax+3ay-2az -2az Q40. For Q39 The total magnetic flux through the surface z = 4, 0
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