SINGLE PHASE INDUCTION MOTOR SOLVED EXAMPLE 1

A 230-V, 50-Hz, 6-pole, single-phase induction motor has the following constants.
R1 = 0.12 Ω, R2 = 0.14 Ω, X1 = X2 = 0.25 Ω, Xm = 15 Ω, a = 1.5
If the core loss is 250 W and friction and windage losses are 500 W. Determine the efficiency and the torque at a sleep of s = 0.05