Physics, asked by ankushrathour2004, 13 hours ago

Calculate the electrical energy consumed by a filament lamp of power 100W in 20 minutes.
a).2000J
b).12000J
c).120000J
d).1000J​​

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Answered by mohantyanu57
1

Answer:

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>>A 100W electric bulb is lighted for 2 hr

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A 100W electric bulb is lighted for 2 hrs daily and four 40 Watt bulbs are lighted for 4 hrs everyday. Calculate the energy consumed in kWh in 30 days.

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Energy = Power*time

Energy consumed by 100 W bulb per day = 2∗100 Wh

= 0.2 kWh

Energy consumed by 40 W bulbs per day = 4∗40∗4 Wh

= 0.64 kWh

Total energy consumed per day = 0.2 + 0.64 kWh

= 0.84 kWh

Therefore, the energy consumed in 30 days = 30∗0.84 kWh

= 25.2 kWh

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