1
GATE ECE 2012
MCQ (Single Correct Answer)
+2
-0.6
An infinitely long uniform solid wire of radius a carries a uniform dc current of density $$\widehat{\mathrm j}$$

The magnetic field at a distance r from the center of the wire is proportional to

A
r for r < a and 1/r2 for r > a
B
0 for r < a and 1/r for r > a
C
r for r < a and 1/r for r > a
D
0 for r < a and 1/r2 for r > a
2
GATE ECE 2010
MCQ (Single Correct Answer)
+2
-0.6
If $$\overrightarrow{\mathrm A}\;=\;\mathrm{xy}\;{\widehat{\mathrm a}}_\mathrm x\;+\;\mathrm x^2\;{\widehat{\mathrm a}}_\mathrm y$$ then $$\oint\overrightarrow{\mathrm A}.\overrightarrow{\mathrm d}\mathcal l$$ over the path shown in the figure is GATE ECE 2010 Electromagnetics - Maxwell Equations Question 29 English
A
$$0$$
B
$$\frac2{\sqrt3}$$
C
1
D
$$2\sqrt3$$
3
GATE ECE 2008
MCQ (Single Correct Answer)
+2
-0.6
The value of the integral of the function $$\mathrm g\left(\mathrm x,\mathrm y\right)=4\mathrm x^3\;+\;10\mathrm y^4$$ along the straight line segment from the point (0, 0) to the point (1, 2) in the x-y plane is
A
33
B
35
C
40
D
56
4
GATE ECE 2003
MCQ (Single Correct Answer)
+2
-0.6
If the electric field intensity is given by $$\mathrm E=\left(\mathrm x{\widehat{\mathrm u}}_\mathrm x\;+\mathrm y{\widehat{\mathrm u}}_\mathrm y+\mathrm z{\widehat{\mathrm u}}_\mathrm z\right)\;\mathrm{volt}/\mathrm m$$, the potential difference between X(2,0,0) and Y(1,2,3) is
A
+1 volt
B
-1 volt
C
+5 volt
D
+6 volt
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