Question

State the commercial unit of electric energy. Express it in terms of SI unit of energy. ??​

Answer 1

Answer:

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Explanation:

Commercial Unit of Electric Energy :-

The unit ‘watt’ is very small. So, practically a much larger unit called ‘kilowatt’ is used. It is equal to 1000 watts. Since electrical energy is the product of power and time, the unit of electric energy is, therefore, watt hour (Wh).

One watt hour is the energy consumed when 1 watt of power is used for 1 hour.

The commercial unit of electric energy is kilowatt hour (kWh), commonly known as ‘unit’. One kilowatt hour is the energy consumed when 1000 watt of power is used for 1 hour.

1 kW h = 1000 watt × 3600 second

= 3.6 × 106 watt second

= 3.6 × 106 joule (J) (where joule ‘J’ is the S.I unit of energy.)

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Answer 2

The trading unit for electrical power and according to the SI unit is:

• Since electricity is a product of energy and time, the unit of electricity is, therefore, a watt (WH) hour.

• One watt hour power is used when 1 watt is used for 1 hour.

• The commercial unit of electricity is a kilowatt hour (kWh), known as a ‘unit’.

• The SI unit of power is Joule.
• Therefore, the relationship between the trade unit and the SI of power is as follows: 1 kWh = 1kW x 1h = 1000W x 1h = 1000 (J / s) x 3600 s = 3.6 x10 6 J.

• The unit of measurement of energy consumption in Joule.
• 1 kWh (kilo watt hour) and 1 unit are the same.
• 1 kWh total power consumption per 1 kW load per hour.
• Therefore, 1 unit = 1 kWh.
• Therefore, 1 Unit Electricity equals 3.6 × 10 6 Joule for power consumption.