1
GATE EE 2007
MCQ (Single Correct Answer)
+2
-0.6
A solid sphere made of insulating material has a radius $$R$$ and has a total charge $$Q$$ distributed uniformly in its volume. What is the magnitude of the electric field intensity, $$E,$$ at distribution $$r\left( {0 < r < R} \right)$$ inside the sphere?
A
$${1 \over {4\pi {\varepsilon _0}}}{{{Q_r}} \over {{R^3}}}$$
B
$${3 \over {4\pi {\varepsilon _0}}}{{Qr} \over {{R^3}}}$$
C
$${Q \over {4\pi {\varepsilon _0}{r^2}}}$$
D
$${1 \over {4\pi {\varepsilon _0}}}{{QR} \over {{r^3}}}$$
2
GATE EE 2007
MCQ (Single Correct Answer)
+1
-0.3
Divergence of the vector field $$$\overrightarrow V\left(x,y,z\right)=-\left(x\cos xy\;+\;y\right)\;\widehat i\;+\;\left(y\cos xy\right)\;\widehat j\;+\;\left(\sin\;z^2\;+\;x^2\;+\;y^2\right)\widehat k$$$ is
A
$$2z\cos z^2$$
B
$$\sin xy\;+\;2z\;\cos z^2$$
C
$$x\sin xy\;-\;cosz$$
D
none of these
3
GATE EE 2007
MCQ (Single Correct Answer)
+1
-0.3
Divergence of the vector field $$v\left( {x,y,z} \right) = - \left( {x\,\cos xy + y} \right)\widehat i + \left( {y\,\cos xy} \right)\widehat j + \left[ {\left( {\sin {z^2}} \right) + {x^2} + {y^2}} \right]\widehat k\,\,$$
A
$$2z\,\cos {z^2}$$
B
$$\,\sin \,xy + 2z\,\cos {z^2}$$
C
$$x\,\sin xy - \cos z$$
D
none of these
4
GATE EE 2007
MCQ (Single Correct Answer)
+2
-0.6
The integral $$\,\,{1 \over {2\pi }}\int\limits_0^{2\Pi } {Sin\left( {t - \tau } \right)\cos \tau \,d\tau \,\,\,} $$ equals
A
$$Sin\,t\cos t$$
B
$$0$$
C
$${1 \over 2}\,\,\cos \,t$$
D
$${1 \over 2}\,\,\sin \,t$$
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12