The circle diagram for an induction motor cannot be used to determine
A. Efficiency
B. Power factor
C. Frequency
D. Output
Answer: Option C
Solution (By Examveda Team)
The circle diagram for an induction motor is a useful tool for analyzing various performance parameters.It can be used to determine:
Efficiency – By analyzing the power losses and output power on the diagram.
Power factor – By examining the power factor on the diagram based on the reactive and real power components.
Output – By evaluating the output power and losses.
However, the circle diagram does not provide direct information about the frequency of the induction motor. The frequency is typically determined separately through other means or directly from the motor's specifications.
Therefore, Option C is the correct answer as it indicates what cannot be determined using the circle diagram.
Join The Discussion
Comments (3)
Related Questions on Polyphase Induction Motors
Which is of the following data is required to draw the circle diagram for an induction motor?
A. Block rotor test only
B. No load test only
C. Block rotor test and no-load test
D. Block rotor test, no-load test and stator resistance test
The starting torque of a three phase induction motor can be increased by
A. Increasing slip
B. Increasing current
C. Both (A) and (B)
D. None of the above
Rotor rheostat control method of speed control is used for
A. Squirrel-cage induction motors only
B. Slip ring induction motors only
C. Both (A) and (B)
D. None of the above
Circle diagram determined efficiency
Iska ans c hoga
Iska ans. Option c hoga sir.. frequency