If the frequency is reduced by 50% for a 3-phase, 50 Hz induction moto – McqOptions

MCQOPTIONS

1.	If the frequency is reduced by 50% for a 3-phase, 50 Hz induction motor having 4 poles. The slip at which the maximum torque occurs becomes _________
A.	2*s
B.	s
C.	1/2s
D.	1/s
Answer» B. s

Discussion

No Comment Found

Related MCQs

If the operating voltage of the induction motor is increased by twice while keeping the frequency of the operation constant. Then the new starting torque will be?
If the voltage and frequency of the induction machine is reduced to 50% of the operating region,the slip of the machine will be?
If the voltage of a three phase induction motor if increased to 200%, then the slip if the machine changes to _________
If the frequency is reduced by 50% for a 3-phase, 50 Hz induction motor having 4 poles. The slip at which the maximum torque occurs becomes _________
I. Maximum torque can be achieved by inserting an additional resistance at desired slip in the rotor. II. Maximum torque can be altered by adding the external resistance in the rotor.
A 3-phase induction motor had the maximum rated torque of 40 N-m while the load torque applied to it is 55 N-m.
An induction motor X operating at the slip of 3%. An induction motor Y operating at slip of 40%.
The torque and the slip characteristic is most correctly related by which of the following below in the region of 30-50% operation of slip.
Choose the most appropriate. The torque slip characteristic of the induction motor at the slip of 3-6 %.
Approximately the efficiency of the rotor of the induction motor depends on the _________