If an emf at slip frequency is injected at an angle ‚âà√≠¬¨¬± with existing rotor induced emf, then$

power factor improves and speed changes

power factor worsens and speed changes

If an emf at slip frequency is injected at an angle ‚âà√≠¬¨�

1.	If an emf at slip frequency is injected at an angle ‚âà√≠¬¨¬± with existing rotor induced emf, then$
A.	power factor only improves
B.	speed changes
C.	power factor improves and speed changes
D.	power factor worsens and speed changes
Answer» B. speed changes