Correct option is B
· DC Series Motor Has the poorest speed regulation because the field winding is connected in series with the armature winding.
· This means the field strength varies with the load current, causing significant changes in speed with varying loads. Under no-load conditions, the speed can increase dramatically, which can be dangerous.
Application of dc series motor:
· Traction Systems
· Cranes and Hoists
· Electric Vehicles
