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CBSE Class 10 Answered

An electric heater is used on a 220V supply and takes a current of 5 amperes. What is its power and what is the cost of using the heater for one hour, if 1kWh costs 50 paisa?
Asked by ms99003456789 | 10 Mar, 2020, 06:04: AM
answered-by-expert Expert Answer
power = voltage × current = 220 × 5 = 1100 W = 1.1 kW
 
Energy consumed for 1 hour operation of electric heater = 1.1 kW × 1 hr = 1.1 kW-hr
 
cost of electrical energy = 1.1 kW-hr × 0.50 ( Rs. / kW-hr) = Rs. 0.55
Answered by Thiyagarajan K | 10 Mar, 2020, 08:14: AM

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