topic : VECTOR CALCULUS

Given,

F = (y+z)i + (z+x)j + (x+y)k

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To Prove :- F is solenoidal

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Proof :-

F is solenoidal if ∇.F = 0

$\therefore\ F = (i\frac{∂}{∂x}\ +\ j\frac{∂}{∂y}\ +\ k\frac{∂}{∂z}). [(y+z)i + (z+x)j + (x+y)k]$

$\implies F =\ \frac{∂}{∂x}(y+z)\ +\ \frac{∂}{∂y}(z+x)\ +\ \frac{∂}{∂z}(x+y)$

$\implies F =\ 0$

$So,\ \therefore\ …