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The load torque referred to the motor shaft through a gear of ratio \( i \) is

  • A.\( T_l/i^2 \)
  • B.\( T_l i^2 \)
  • C.\( T_l/i \)
  • D.\( T_l i \)

Answer: C

Torque refers with the first power of the ratio while inertia refers with the square, which is the single most useful fact in drive calculations. Efficiency of the gearing divides the referred torque further in a real installation.

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