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A 100 watt light bulb burns on an average of 10 hours a day for one week. The weekly consumption of energy will be
- a)7 units
- b)700 units
- c)70 units
- d)0.7 units
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A 100 watt light bulb burns on an average of 10 hours a day for one we...
Energy consumption per week is
W= 100 x 10 x 7
= 7000 kW - hr
= 7 units
W= 100 x 10 x 7
= 7000 kW - hr
= 7 units
Most Upvoted Answer
A 100 watt light bulb burns on an average of 10 hours a day for one we...
Energy Consumption Calculation for a 100 Watt Light Bulb
Given:
Power of the light bulb = 100 watts
Average daily usage = 10 hours
Weeks of usage = 1
To determine the weekly consumption of energy, we need to calculate the total energy consumed by the light bulb in a week.
1. Calculate the daily energy consumption:
Energy = Power × Time
Energy = 100 watts × 10 hours
Energy = 1000 watt-hours or 1 kilowatt-hour (kWh)
2. Calculate the weekly energy consumption:
Since the light bulb is used for 10 hours every day, the weekly energy consumption can be calculated by multiplying the daily energy consumption by the number of days in a week.
Weekly energy consumption = Daily energy consumption × Number of days in a week
Weekly energy consumption = 1 kWh × 7 days
Weekly energy consumption = 7 kWh
3. Convert kWh to units:
In many countries, electricity is billed in units or kilowatt-hours (kWh). One unit is equal to one kilowatt-hour (kWh).
So, the weekly energy consumption can be converted to units by dividing it by the conversion factor.
1 unit = 1 kWh
7 kWh ÷ 1 kWh/unit = 7 units
Therefore, the correct answer is option 'A': 7 units.
Given:
Power of the light bulb = 100 watts
Average daily usage = 10 hours
Weeks of usage = 1
To determine the weekly consumption of energy, we need to calculate the total energy consumed by the light bulb in a week.
1. Calculate the daily energy consumption:
Energy = Power × Time
Energy = 100 watts × 10 hours
Energy = 1000 watt-hours or 1 kilowatt-hour (kWh)
2. Calculate the weekly energy consumption:
Since the light bulb is used for 10 hours every day, the weekly energy consumption can be calculated by multiplying the daily energy consumption by the number of days in a week.
Weekly energy consumption = Daily energy consumption × Number of days in a week
Weekly energy consumption = 1 kWh × 7 days
Weekly energy consumption = 7 kWh
3. Convert kWh to units:
In many countries, electricity is billed in units or kilowatt-hours (kWh). One unit is equal to one kilowatt-hour (kWh).
So, the weekly energy consumption can be converted to units by dividing it by the conversion factor.
1 unit = 1 kWh
7 kWh ÷ 1 kWh/unit = 7 units
Therefore, the correct answer is option 'A': 7 units.
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