In 1-ϕ IM if the slip of motor is S with regard to the forward rotating flux, then its slip with regard to the backward rotating flux will be:

Option 1: 1-s

Option 2: s-1

Option 3: s

Option 4: 2-s

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Correct Option: 4

Explanation

The slip of a single phase induction motor with regard to the forward rotating flux is S. The flux can be resolved into two components, forward and backward. The slip with regard to the backward rotating flux is 2-S.