Question 259Electricity/Electronics - Assistant Engineer70% to pass
How is the difference between the synchronous speed of a three phase induction motor and its operating speed correctly expressed?
AI Explanation
The correct answer is A) slip.
The difference between the synchronous speed and the operating speed of a three-phase induction motor is correctly expressed as the slip. Slip is defined as the difference between the synchronous speed and the actual operating speed of the motor, expressed as a percentage of the synchronous speed. This is the standard way to quantify the speed difference in induction motors according to electrical engineering principles and motor specifications.
The other options are incorrect because: B) a percent of full load speed is redundant, as slip is already expressed as a percentage; C) deviation is a more general term that does not specifically describe the speed difference; and D) a decimal fraction of full load speed is less common and less informative than the slip percentage.
Related Questions
#257 What can be the cause of excessive heat or burning contacts in an operating motor controller? #258 As shown in the two-speed single winding three phase motor connection diagrams illustrated in figure "B", what is the connection scheme associated with low-speed operation? Illustration EL-0118 #260 In a three-phase, squirrel-cage type, induction motor, how is the primary rotating magnetic field established? #261 Which of the listed motors will operate at the highest RPM, assuming that each operates at the same frequency? #262 The torque-speed and current-speed curves for a three-phase induction motor with a squirrel cage rotor are shown in figures "A" and "B" of the illustration. Which of the following statements is true concerning the depicted curves? Illustration EL-0056