A. improve starting torque
B. reduce copper losses
C. improve efficiency
D. improve power factor
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The Answer Is ,A
This design is known as the Deep Bar Rotor, which helps to increase the starting torque of the motor by increasing its rotor resistance.
This helps to reduce the amount of current flowing through the rotor, thereby reducing copper losses and improving the efficiency of the motor. Additionally, this design also increases the power factor of the motor, making it more efficient.