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Answer :
Final answer:
To find the electrical energy consumed by a 100W bulb used for 8 hours daily over 30 days, convert power to kilowatts, multiply by total hours, resulting in 24 kWh of energy consumed.
Explanation:
The student's question revolves around calculating the electrical energy consumed by a bulb with a specific power rating and voltage when used for a set duration each day over a month. To calculate the electrical energy consumed, one needs to understand that energy (in kilowatt-hours, kWh) is equal to power (in watts, W) multiplied by time (in hours, h). Given that the bulb has a power rating of 100W and is used for 8 hours daily for 30 days, the total energy consumed can be calculated.
First, convert the power to kilowatts:
100W = 0.1kW.
Next, calculate the total hours used in a month: 8 hours/day * 30 days = 240 hours.
Now, multiply the power in kilowatts by the total hours to find the energy in kWh: 0.1kW * 240 hours = 24 kWh.
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