Question 259Electricity & Electronics - Assistant Engineer

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.