Rate of doing work or rate of transfer of energy is called ________.

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RPF SI (2018) Official Paper (Held On : 06 Jan 2019 Shift 3)
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  1. Joule
  2. Power
  3. Force
  4. Speed

Answer (Detailed Solution Below)

Option 2 : Power
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the correct answer is Power

Key Points 

  • Power - Power is defined as the rate at which work is done or energy is transferred over time. It is measured in Watts (W) in the International System of Units (SI), where one Watt equals one Joule per second.

Additional Information 

  • Power quantifies the speed at which work is completed or energy is converted.
  • Joule: This is a unit of work or energy in the SI system, not a rate. One Joule is the energy transferred to an object when a force of one newton acts on it over a distance of one meter. -
  • Force: Force is a physical cause that changes or may tend to change the state of rest or motion of an object. It is measured in Newtons (N) in the SI system. Force itself is not a rate but a vector quantity causing acceleration.
  • Speed: Speed is a scalar quantity that refers to how fast an object is moving. It is the rate of change of distance with respect to time but does not directly relate to the concepts of work or energy transfer.
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