1
GATE EE 2014 Set 2
MCQ (Single Correct Answer)
+1
-0.3
A parallel plate capacitor consisting two dielectric materials is shown in the figure. The middle dielectric slab is place symmetrically with respect to the plates. If the potential difference between one of the plates and the nearest surface of dielectric interface is 2 Volts, then the ratio $$\varepsilon_1\;:\;\varepsilon_2$$ is
A
1:4
B
2:3
C
3:2
D
4:1
2
GATE EE 2010
MCQ (Single Correct Answer)
+1
-0.3
Divergence of the three-dimentional radial vector field $$\overrightarrow F$$ is
A
3
B
1/r
C
$$\widehat i+\widehat j+\widehat k$$
D
$$3\left(\widehat i+\widehat j+\widehat k\right)$$
3
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
4
GATE EE 2004
MCQ (Single Correct Answer)
+1
-0.3
A parallel plate capacitor is shown in Fig. It is made of two square metal plates of $$400$$ $$mm$$ side. The $$14$$ $$mm$$ space between the plates is filled with two layers of dielectrics of $${\varepsilon _r} = 4,6\,\,mm$$ thick and $${\varepsilon _r} = 2,8\,\,mm$$ thick. Neglecting fringing of fields at the edges, the capacitance is
A
$$1298\,pF$$
B
$$944\,pF$$
C
$$354\,pF$$
D
$$257\,pF$$
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