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If we increase the angular speed of the rotor, the power of it will _________
1. decrease
2. increase
3. first increase then decrease
4. first decrease then increase

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Correct Answer - Option 2 : increase


  • Torque: The twist to an object around a specific axis is called torque. It is the vector product of position vector and force.
    • It is also known as the turning effect.
  • The power of the rotor required to transmit energy to apply a torque τ to rotate it with angular velocity ω is

P = τ ω


The power of a rotating rotor is given by

P = τ ω

P ∝ ω 

  • So, if we increase the angular speed of the rotor, the power will increase.
  • Hence, the correct answer is option 2.

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