In case of DC shunt motor if load is reduced
A. DC Shunt Motor
B. The speed will increase abruptly.
C. The speed will remains almost constant.
D. The speed will increase in proportion to reduction in load.
Answer: C
Share your understanding of this question with the correct explanation.
In the case of a DC shunt motor, if the load is reduced, the speed will remain almost constant.
A DC shunt motor is designed to have a relatively constant speed over a wide range of load conditions. The speed of a DC shunt motor is primarily determined by the balance between the electromagnetic torque produced by the armature current and the mechanical load torque.
When the load on a DC shunt motor is reduced, the mechanical load torque decreases. However, the armature current and the magnetic field strength produced by the field winding remain relatively unchanged. As a result, the electromagnetic torque provided by the motor remains relatively constant.
With the load torque reduced and the electromagnetic torque remaining constant, the motor’s speed does not need to change significantly to maintain this balance. Therefore, the speed of a DC shunt motor will remain almost constant when the load is reduced.
Therefore, the correct answer is C: The speed will remain almost constant. In a DC shunt motor, if the load is reduced, the speed of the motor will not increase abruptly or in proportion to the reduction in load. It will instead remain nearly constant due to the inherent characteristics of the motor.