Question: Consider the following arbitrary fields. Find out which of them can possibly represent electrostatic or magnetostatic field in free space. (a) A = y cos

Consider the following arbitrary fields. Find out which of them can possibly represent electrostatic or magnetostatic field in free space.
(a) A = y cos αxax + (y + e–x)az
(b) B = 20/ρ aρ
(c) C = r2 sin θ aΦ

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