Electrical Engineering · Electrical Machines
Which of the following statements is INCORRECT regarding a slip-ring type induction motor?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It can be used as a variable speed motor by inserting external resistance.
- 2Its operating power factor is higher than that of a squirrel cage induction motor under all load conditions.✓
- 3It generally provides lower efficiency compared to a squirrel cage induction motor due to rotor copper losses.
- 4Its starting current can be limited to a low value by adding external rotor resistance.
Correct answer
Its operating power factor is higher than that of a squirrel cage induction motor under all load conditions.
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