Question

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(I) State and define the unit of power

(II)How is the unit horse power related to S.I. unit power

(III)In the Attachment :)

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Answer 1

1.Power is defined by the amount of work done performed per unit time or rate of doing work. The SI unit of the power is Watt, which is termed as joule per second. In the case of a mechanical system, power is the product of force and velocity, whereas, for an electrical system, power is the product of current and voltage.

2.The electrical equivalent of one horsepower is 746 watts in the International System of Units (SI), and the heat equivalent is 2,545 BTU (British Thermal Units) per hour. Another unit of power is the metric horsepower, which equals 4,500 kilogram-metres per minute (32,549 foot-pounds per minute), or 0.9863 horsepower.

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Answer 2

Explanation:

In physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity.

SI unit of power is Watt.

1 horse power =746 Watt