# Vector field

#### danai_pa

A vector field is difined by A = f(r)r.

a) show that f(r) = constant/r^3 if divergence A equal to zero.

b) show that curl A is alway equal to zero

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#### StatusX

Homework Helper
Do you know the equations for divergence and curl in spherical coordinates?

#### danai_pa

StatusX said:
Do you know the equations for divergence and curl in spherical coordinates?
yes i known.

#### StatusX

Homework Helper
so plug it in........

#### danai_pa

StatusX said:
so plug it in........
i think you mean, find a divergence and curl in a spherical coordinates. vector r is represent r, theta and phe

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