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Q: The rate of doing work is called power. The unit of power is
  • A. Ampere
  • B. Volt
  • C. Kelvin
  • D. Watt
Correct Answer: Option D - In physics, power is the rate of doing work. It is the amount of energy consumed per unit of time. The unit of power is the joule per second (J/s), known as the Watt (in honor of James Watt, the eighteenth century developer of the steam engine). (1 HP =746 watt).
D. In physics, power is the rate of doing work. It is the amount of energy consumed per unit of time. The unit of power is the joule per second (J/s), known as the Watt (in honor of James Watt, the eighteenth century developer of the steam engine). (1 HP =746 watt).

Explanations:

In physics, power is the rate of doing work. It is the amount of energy consumed per unit of time. The unit of power is the joule per second (J/s), known as the Watt (in honor of James Watt, the eighteenth century developer of the steam engine). (1 HP =746 watt).