1
GATE ME 2014 Set 1
MCQ (Single Correct Answer)
+2
-0.6
The integral $$\,\,\oint\limits_C {\left( {ydx - xdy} \right)\,\,} $$ is evaluated along the circle $${x^2} + {y^2} = {1 \over 4}\,$$ traversed in counter clockwise direction. The integral is equal to
A
$$0$$
B
$$ - {\pi \over 4}$$
C
$$ - {\pi \over 2}$$
D
$$ {\pi \over 4}$$
2
GATE ME 2013
MCQ (Single Correct Answer)
+2
-0.6
The following surface integral is to be evaluated over a sphere for the given steady velocity vector field $$F = xi + yj + zk$$ defined with respect to a Cartesian coordinate system having $$i, j$$ and $$k$$ as unit base vectors. $$$\int {\int\limits_S {{1 \over 4}\left( {F.n} \right)dA} } $$$

Where $$S$$ is the sphere, $$\,\,{x^2} + {y^2} + {z^2} = 1\,\,$$ and $$n$$ is the outward unit normal vector to the sphere. The value of the surface integral is

A
$$\pi $$
B
$$2$$$$\pi $$
C
$$3$$ $$\pi $$$$/4$$
D
$$4$$ $$\pi $$
3
GATE ME 2009
MCQ (Single Correct Answer)
+2
-0.6
The divergence of the vector field $$\,3xz\widehat i + 2xy\widehat j - y{z^2}\widehat k$$ at a point $$(1,1,1)$$ is equal to
A
$$7$$
B
$$4$$
C
$$3$$
D
$$0$$
4
GATE ME 2008
MCQ (Single Correct Answer)
+2
-0.6
The directional derivative of the scalar function $$f(x, y, z)$$$$ = {x^2} + 2{y^2} + z\,\,$$ at the point $$P = \left( {1,1,2} \right)$$ in the direction of the vector $$\,\overrightarrow a = 3\widehat i - 4\widehat j\,\,$$ is
A
$$-4$$
B
$$-2$$
C
$$-1$$
D
$$1$$
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Turbo Machinery
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Graduate Aptitude Test in Engineering
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CBSE
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