The external resistance can be inserted in rotor circuit of _________
(a) wound rotor induction motor
(b) slip ring induction motor
(c) wound rotor as slip ring induction motor
(d) neither of motors
I have been asked this question by my college director while I was bunking the class.
This interesting question is from Flux and MMF Phasors and Waves in Induction Motors topic in section Induction Machines of Electrical Machines