The correct answer is: A. Series motor
A series motor is a type of DC motor that has the field winding and the armature winding connected in series with each other. This means that the current flowing through the field winding is the same as the current flowing through the armature winding. This results in a high starting torque, which makes series motors ideal for applications where a high starting torque is required, such as conveyors.
A shunt motor is a type of DC motor that has the field winding connected in parallel with the armature winding. This means that the current flowing through the field winding is independent of the current flowing through the armature winding. This results in a lower starting torque than a series motor, but a higher speed regulation.
A differentially compound motor is a type of DC motor that has both a series field winding and a shunt field winding. The series field winding is connected in series with the armature winding, while the shunt field winding is connected in parallel with the armature winding. This results in a motor that has a high starting torque and a high speed regulation.
A cumulative compound motor is a type of DC motor that has both a series field winding and a shunt field winding. The series field winding is connected in series with the armature winding, while the shunt field winding is connected in series with the armature winding. This results in a motor that has a high starting torque and a high speed regulation.
However, the series motor is the preferred type of motor for conveyors because it has the highest starting torque.