Question

derive the relation of commercial and unit of electric energy with s.i. unit of energy....​

Answer 1

Answer:

Kilowatt - hour is the commercial unit of electrical energy. We have seen that power is the rate of energy consumed or delivered. If 1 joule of energy is used per second, we say that energy is used at the rate of 1 watt. One kilowatt hour of electric energy is called one 'unit'.

SI unit of energy is joule(J) and commercial unit of energy is kWh(kilowatt-hour). Therefore, 1 kWh = 3.6 x 10^6 J.

Answer 2

Given,

The commercial unit of electrical energy and the S.I unit of electrical energy.

To Derive,

The relation between commercial and unit of electric energy with S.I unit of energy.

Solution,

The S.I unit of energy is joules and the commercial unit of electrical energy is kWH.

Now,

1 kWh = 1000 Wh

Noe, we know that 1 hour = 60*60 minutes = 3600 minutes

So,

1 kWh = 1000 W*3600 s

1 kWh = 3600000 Joules

1 kWh = 3.6×10₆ Joules.

Hence, the relation between commercial and unit of electric energy with S.I unit of energy is 1 kWh = 3.6×10₆ Joules.

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