Physics Electricity CBSE Board 2026 Medium
A smart home uses energy monitoring system to track electricity usage of appliances. In a month of 30 days, t…
A smart home uses energy monitoring system to track electricity usage of appliances. In a month of 30 days, the following devices are used :
1. An electric heater of W used for hours daily.
2. A microwave oven rated at kW used for hours daily.
- (i)Define electric power and write its SI unit.
- (ii)Calculate the total energy consumed in joules and kWh in a whole month.
- (iii)Find out the total cost of electricity for running both appliances for a month of 30 days if the cost of 1 unit is ₹ 7.
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