Calculate the actual rotor speed in rads at maximum steadyst

Calculate the actual rotor speed, in rad/s, at maximum steady-state torque for the machine given in Example 6C for operation as a motor 3 when connected to an electric source of (a) 120 Hz with twice ratedi voltage, (6) 60 Hz with rated voltage, (c) 30 Hz with one-half rated voltage, and (d) 6 Hz with 10 percent rated voltage.

Solution

where is example 6c