Which of the following is the relation between the units of energy N-m/s and Watt?

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ISRO VSSC Technician-B (Fitter) Official Paper (Held On: 14 July 2021)
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  1. \(1{{N - m}\over s}\) = 0.36 Watt
  2. \(1{{N - m}\over s}\) = 3.60 Watt
  3. \(1{{N - m}\over s}\) = 1 Watt
  4. \(1{{N - m}\over s}\) = 9.81 Watt

Answer (Detailed Solution Below)

Option 3 : \(1{{N - m}\over s}\) = 1 Watt
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Detailed Solution

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Explanation:

Energy:

  • Energy is defined as the capacity to do some work.
  • It is the power that is integrated over time.
  • The unit used to measure energy is joules, ergs, or calories.
  • The SI unit of energy is joule or N-m

Power:

  • Power is defined as the rate at which specific work is done or which energy is transmitted.
  • The unit used to measure power is watt or joules per second.
  • The SI unit of power is watt or joule/second or N-m/s
  • The relation between the units of energy N-m/s and Watt is \(1{{N - m}\over s}\) = 1 Watt.
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