For a secondary resistance starter explain why "the "power factor" is low and the "torque" is small:
The greater part of the rotor winding is surrounded by iron so the rotor circuit is highly inductive. At starting, the rotor frequency is equal to the stator frequency, and so the reactance is great compared with the resistance. The rotor current therefore lags the rotor e.m.f by a large angle, the power factor is low and consequently the torque is small