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Problems in Mathematical Analysis.pdf - pwp.net.ipl.pt

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292_Mult<strong>ipl</strong>e and L<strong>in</strong>e Integrals_(Ch. 7<br />

2398. F<strong>in</strong>d out whether the given vector field has a potential U,<br />

and f<strong>in</strong>d U if the potential exists:<br />

a) a<br />

b) a<br />

c) a =<br />

2399. Prove that the central space field = /(r)rwill be so-<br />

lenoidal only when f(r) = ~, where k is constant.<br />

2400. Will the vector field a = r(cxr) be solenoidal (where c<br />

is a constant vector)?

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