ISRO Electrical Engineering (EE) 2013 - Question 34

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When the supply voltage to an induction motor is reduced by 10%, the maximum torque decreased by approximately

  • A. 5%
  • B. 10%
  • C. 20%
  • D. 40%

Answer: C. 20%

Explanation: Tmax ∝ V²: 0.9² = 0.81, a fall of about 19–20 %.

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