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Geyser has a rating 2 kva, 240 v a) What is the electrical energy consumed by (i) kwh (ii) joule if it is used for 90 minutes. b) If the cost of electricity is Rs 4.50 per commercial unit find the cost |
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Answer» Power rating of Geyser = 2kva = 2000W (because p=vi) Now, Power= 2Kw Time= 90minutes = 3/2hours Energy consumed = Pxt 2x3/2= 3Kwh or 3 units. Now cost of electricity = 3x 4.5Rs/- = 13.5Rs/-.
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