1
GATE PI 2011
MCQ (Single Correct Answer)
+2
-0.6
If $$T(x, y, z)$$ $$ = {x^2} + {y^2} + 2{z^2}$$ defines the temperature at any location $$(x, y, z)$$ then the magnitude of the temperature gradient at point $$P(1,1,1)$$ is _________.
A
$$2$$$$\sqrt 6 $$
B
$$4$$
C
$$24$$
D
$$\sqrt 6 $$
2
GATE PI 2007
MCQ (Single Correct Answer)
+2
-0.6
The angle (in degrees) between two planar vectors $$\vec a = {{\sqrt 3 } \over 2}\widehat i + {1 \over 2}\widehat j$$ and $$\vec b = {{ - \sqrt 3 } \over 2}\widehat i + {1 \over 2}\widehat j$$ is
A
$$30$$
B
$$60$$
C
$$90$$
D
$$120$$
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