Physics
Grade-9
Easy
Question
The relation between the commercial unit and the SI unit of energy is
- 3.6 × 108 J
- 3.6 × 106 kJ
- 3.8 × 106 J
- 3600000 J
Hint:
- The commercial unit of energy is 1 kWh. One kilowatt-hour is defined as the amount of energy consumed by a device in one working hour at a constant rate of one kilowatt.
- The SI unit of energy is joule.
The correct answer is: 3600000 J
- The commercial unit of energy is 1 kWh. One kilowatt-hour is defined as the amount of energy consumed by a device in one working hour at a constant rate of one kilowatt.
- The SI unit of energy is joule.
- 1 kWh = 1 kW x 1 h = 1000 W x 3600 s
∴1kWh=
J
∴1kWh=
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