1
GATE ECE 2006
MCQ (Single Correct Answer)
+1
-0.3
For the function of a complex variable w = lnz (where w = u + jv and z = x + jy) the u = constant lines get mapped in the z-plane as
A
set of radial straight lines
B
set of concentric circles
C
set of confocal hyperbola
D
set of confocal ellipses
2
GATE ECE 2006
MCQ (Single Correct Answer)
+1
-0.3
The value of the counter integral $$$\int\limits_{\left| {z - j} \right| = 2} {{1 \over {{z^2} + 4}}\,} dz\,\,in\,the\,positive\,sense\,is$$$
A
$${{j\pi } \over 2}$$
B
$${{ - \pi } \over 2}$$
C
$${{ - j\pi } \over 2}$$
D
$${\pi \over 2}$$
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