When a synchronous machine is operating at a steady load indicated by P(0, δ0) as shown in the graph, certain limited amplitude disturbances are bound to occur. These disturbances could be due to:
A. Sudden changes in load; Electrical, mechanical
B. Sudden changes in field current
1
Both A & B are true
2
Both A & B are false
3
Only A is true
4
Only B is true