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Engine_2014 : Electricity - 1283/2299
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The torque-speed and current-speed curves for a three- phase induction  motor with a squirrel cage rotor are shown in figures "A" and "B" of the illustration. Which of the following statements is true concerning the depicted curves?
A) The starting current is nearly 1.5 times the normal full load current value.
B) The pull-up point on the torque curve is about 20% of the normal full load torque value.
C) Rated torque and rated current occur at approximately 20% slip.
D) Starting current is approximately 4.75 times the normal full load current value.
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Illustration EL-0056

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