Q. 22 For the function of a complex variable W = lnZ (where, W = u + jv and
Z = x + jy, the u = constant lines get mapped in Z -plane as
(A) set of radial straight lines
(B) set of concentric circles
(C) set of confocal hyperbolas
(D) set of confocal ellipses
Answer: (B)
Explanation:
