Answer:
option 1) Armature current is the correct answer.
Explanation:
In a shunt motor, torque is proportional to the armature current.
The torque produced by a shunt motor is determined by the interaction between the magnetic field produced by the field winding (shunt winding) and the current flowing through the armature winding. The armature current is the current flowing through the armature winding, which is connected in parallel (shunt) with the field winding.
According to the principle of electromagnetic induction, the interaction between the magnetic field and the current in the armature winding generates a mechanical force, which results in torque. The magnitude of this torque is directly proportional to the armature current.
In a shunt motor, torque is proportional to:
The square of the armature current.
The torque in a shunt motor is given by the expression
[tex]T∝ I_{a} ^{2}[/tex]
where T is the torque and [tex]I_{a}[/tex] is the armature current. This means that the torque is directly proportional to the square of the armature current in a shunt motor.
Therefore, option 1) Armature current is the correct answer.
