If is the unit outward drawn normal to any dosed surface S, then
Let T (x, y, z) = xy2 + 2z – x2z2 be the temperature at the point (x, y, z). The unit vector in the direction in which the temperature decrease most rapidly at (1, 0, – 1) is
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Let S be the oriented surface x2 + y2 + z2 = 1 with the unit normal n pointing outward. For the vector field F(x, y, z) = xi + yj + zk, the value of is
Let denote the force field on a particle traversing the path L from (0, 0, 0) to (1, 1, 1) along the curve of intersection of the cylinder y = x2 and the plane z = x. The work done by is
A vector point function F is said to be solenoidal, if and only if
The work done in moving a particle in the force field F = 3x² i + (2xz - 9y) j+ zk along the line joining (0 , 0, 0) to (2 ,1, 3) is
If φ = sin (x + y + 2z) + x2 y3z, then curl grad φ is equal to
Consider the vector field , where a is a constant. If , then the value of a is