The full load torque of an induction motor does NOT depend on

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BSPHCL JE Electrical 2019 Official Paper: Batch 2 (Held on 31 Jan 2019)
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  1. Flux produced by the stator
  2. Rotor current per phase
  3. Rotor power factor
  4. Whether it is a squirrel cage or a slip ring type

Answer (Detailed Solution Below)

Option 4 : Whether it is a squirrel cage or a slip ring type
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Detailed Solution

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Concept:

The torque equation of the three-phase induction motor is given as

Rotor current 

Ns = speed of the motor

s = slip of the motor

R2 = rotor resistance

X2 = rotor reactance

E2 = rotor-induced emf

Hence it's independent of the type of machine.

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