For a DC generator, the speed of the rated operating state is reduced to 30% of the original speed, but the excitation current and armature current remain unchanged______
A. Ea drops by 30%
B. T decreased by 30%
C. Ea and T all drop by 30%
D. The terminal voltage drops by 30%
Answer:A
For a DC generator, the speed of the rated operating state is reduced to 30% of the original speed, but the excitation current and armature current remain unchanged______
A. Ea drops by 30% B. T decreased by 30% C. Ea and T all drop by 30% D. The terminal voltage drops by 30%