Context: Finally, hysteresis synchronous motors typically are (essentially) two-phase motors with a phase-shifting capacitor for one phase. They start like induction motors, but when slip rate decreases sufficiently, the rotor (a smooth cylinder) becomes temporarily magnetized. Its distributed poles make it act like a PMSM. The rotor material, like that of a common nail, will stay magnetized, but can also be demagnetized with little difficulty. Once running, the rotor poles stay in place; they do not drift.

Question: What do hysteresis synchronous motors' rotors do when slip rate decreases?
Answer: becomes temporarily magnetized

Question: When in operation, what do hysteresis synchronous motors poles do?
Answer: stay in place

Question: What do hysteresis synchronous motors resemble at startup?
Answer: induction motors

Question: How can a hysteresis synchronous motor's rotor be described?
Answer: a smooth cylinder

Question: What do the distributed poles of a hysteresis synchronous motor resemble?
Answer: PMSM

Question: What do hysteresis synchronous motors' rotors do when slip rate increases?
Answer: Unanswerable

Question: When in operation, what don't hysteresis synchronous motors poles do?
Answer: Unanswerable

Question: What do hysteresis synchronous motors not resemble at startup?
Answer: Unanswerable

Question:  How can't a hysteresis synchronous motor's rotor be described?
Answer: Unanswerable

Question: What do the undistributed poles of a hysteresis synchronous motor resemble?
Answer: Unanswerable