1
GATE IN 2013
+1
-0.3
For a vector $$E,$$ which one of the following statements is NOT TRUE?
A
If $$\nabla .E = 0,E$$ is called
B
If $$\nabla \times E = 0,$$ $$E$$ is called conservative
C
If $$\nabla \times E = 0,$$ $$E$$ is called irrotational
D
If $$\nabla .E = 0,E$$ is called irrotational
2
GATE IN 2009
+1
-0.3
A sphere of unit radius is centered at the origin. The unit normal at a point $$(x, y, z)$$ on the surface of the sphere is the vector.
A
$$(x, y, z)$$
B
$$\left( {{1 \over {\sqrt 3 }},{1 \over {\sqrt 3 }},{1 \over {\sqrt 3 }}} \right)$$
C
$$\left( {{x \over {\sqrt 3 }},{y \over {\sqrt 3 }},{z \over {\sqrt 3 }}} \right)$$
D
$$\left( {{x \over {\sqrt 2 }},{y \over {\sqrt 2 }},{z \over {\sqrt 2 }}} \right)$$
3
GATE IN 2005
+1
-0.3
If a vector $$\overrightarrow R \left( t \right)$$ has a constant magnitude then
A
$$\overrightarrow R .{{d\overrightarrow R } \over {dt}} = 0$$
B
$$\overrightarrow R \times {{d\overrightarrow R } \over {dt}} = 0$$
C
$$\overrightarrow R .\overrightarrow R {{d\overrightarrow R } \over {dt}}$$
D
$$\overrightarrow R \times \overrightarrow R {{d\overrightarrow R } \over {dt}}$$
GATE IN Subjects
EXAM MAP
Medical
NEET