Question

difference between si unit and commercial unit of energy

Answer 1

The SI unit joule is too small to express very large quantities of energy. Hence we use a bigger unit called kilowatt hour (kWh) to express energy. 1 kWh is the amount of energy consumed by an electrical gadget in one hour at the rate of 1000 J/s or 1kW.

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Answer 2

Explanation:

• Power delivered by an object is given by energy consumed per unit time. It can be calculated using the product of power and time. Its SI unit is Joule.
• The commercial unit of energy is kilowatt hour or kWh.
• The relation between SI unit and commercial unit of energy is:

$1\ kWh=3.6\times 10^6\ J$

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Difference between is unit and commercial unit of energy

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