Question

Calculate the value of new slip using the given data: V1=12 V, S1=.1, V2=5.

(a) 0.576

(b) 0.247

(c) 0.487

(d) 0.987

The question was asked in unit test.

Question is from Induction Motors topic in section Speed Control of Direct Current Motors & Induction Motors of Electric Drives

Answer 1

Correct choice is (a) 0.576

For explanation I would say: This question is based on the concept of stator voltage control method. The load torque remains constant. S1V1^2=S2V2^2=constant. S2=.576.