Induction Motor Question

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Slip is the difference between the synchronous speed of the electrical supply, and the rotational speed of the rotor. The electrical supply creates magnetic fields in the stator, which THEN induce current in the rotor, which THEN creates magnetic fields that make the rotor spin. The time lag in creating those magnetic fields is what causes slip.

Torque is twisting force.

more like the time lag of the rotor rotation catching up with the positions of the stator field loci

Slip is when you fall down
Talk is asking meaningless questions

Use Google for the basics, anything you don't understand we may help if you show you have tried yourself

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For some practical examples of slip, in 50 Hz systems, the synchronous speeds of 2/4/6-pole motors are respectively 3000/1500/1000 rpm. However, on the motor nameplates you will see numbers such as 2950/1460/970 rpm (with some range of variation.) The differences between these rpms constitute the slip, which can also be stated in percent.

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GA! The OP definitely needs help learning how to do an internet search. If he/she can't do that, then they surely can't answer their homework question.

Slip is what lies directly below a lady's skirt.

Torque is what you feel when her hand hits the side of your face as you try to lift her slip.

I thought the OP asked about slip, not slap.

The slip depends on the number of commutator rings and is calculated using the gaussian variable for magnetic flux vectors revolving at 90 degree variances (you can use 89.6 degrees to 90.9 degrees). Don't forget to use the correct formula for an iron core vs air core - the permeance of magnetic flux is different for the two materials and it can even vary based on the density of the air and the humidity.

The torque is the twisting motion the impeller drives at right angles to the electromotive force. A DC induction motor is a tricky one to determine the torque, since the alternating fields are not in direct proportion to the Direct Current Flow. I would try using a high quality meter, such as a FLIR or Fluke and read the transfer impedance when rotating at 95% of peak speed. Make sure the acceleration is only 30-35% of the rated amount when doing the test. Place a 220V DC source at the positive and negative pole and use a capacitive start vs an inductive start to get the motor turning.

The rotational moment of inertia should cause a slight thermodynamic imbalance to the stator, but don't worry, because proper shielding of the RF interference will not require the use of a Smith Chart of Linville Chart - it surely reduces the transconductance error.

I hope this helps.

"I hope this helps."

It doesn't.