For efficient operation of a dc motor, the additional resistance inserted in the armature circuit should be
A. increased in steps.
B. cut-out in steps.
C. left in the armature circuit.
D. removed immediately after start.
Answer:B
For efficient operation of a dc motor, the additional resistance inserted in the armature circuit should be
A. increased in steps. B. cut-out in steps. C. left in the armature circuit. D. removed immediately after start.