QUESTION $1$

A $60$ Hz $450$ V induction motor, three phase, has the following parameters: $R1=R{2}^{\text{'}}=0\mathrm{.}025$ Ohms, xeq$=0\mathrm{.}4$Ohms and is a eight pole machine. At full load the motor speed is $860$ rpm $,$ the rotational losses are $300$ Watts and the core loss is $2000$ Watts. Find:

a$.$ Slip

b$.$ Developed torque at full load

c$.$ Starting torque of the motor

d$.$ Rotor Current

e$.$ Starting current of the motor

f$.$ Motor Efficiency

g$.$ What stator resistance would need to be added to make the starting torque equal to the maximum torque?