It the shunt admittance of the transmission line is ignored, the torque angle at which maximum power will occur is

(a) pie/4
(b) -– pie/2
(c) pie/2
(d) pie

For constant transmission efficiency, voltage is increased n times, the size of the conductor would be

(a) reduced to (1/(n*n)) times of the original 
(b) increased to (n*n) times of the original
(c) reduced to (1/n) times of the original
(d) increased to n times of the original

A power system is subjected to a fault which makes the zero sequence component of current equal to zero. The nature of fault current is:

A) Double line to ground fault
B) Line to line fault
C) Line to ground fault
D) Three-phase to ground fault