(a) Derive the relation between commercial unit of energy (kWh) and SI unit of energy (joule). (b) A certain household consumes 650 units of electricity in a month. How much is this electricity in joules?
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- Kilowatt - hour is the commercial unit of electrical energy. ... 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.
- The energy consumed by the house in a month = 650 units = 650 kWh. = 23.40 × 10^10 joules.
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