Q. A 220 V, 15 kW, 1000 RPM shunt Motor with an armature resistance of 0.25Ω, has a rated line current of 68 A and a rated field current of 2.2 A. The change in field flux required to obtain a speed of 1600 RPM while drawing a line current of 52.8 A and a field current of 1.8 A is
A. 18.18% Increase
B. 18. 18% decrease
C. 36.36 % increase
D. 36. 36 % decrease
Answer: 36.36% decrease
