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The total energy used in one hour by 10 100W light bulbs is 1 kWh (kilowatt-hour). To calculate this, you multiply the power of each bulb by the number of bulbs and the time they are on. In this case, 100W * 10 bulbs * 1 hour = 1000 watt-hours = 1 kWh.

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1y ago

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Related Questions

How much does energy efficent light bulbs cost per hour?

There is actually no energy efficient light bulbs in a way to interpret in physical determination. Energy efficient means less Watts required per hour compared to non energy efficient.


Do energy efficient bulbs really reduce an electric bill?

Yes A 100watt light bulb left on for 10 hours will use a much electricity as a 1 Kilowatt fire left on for one hour. An energy efficient light bulb giving out the same amount of light as a 100watt bulb, only actually uses 20watts of electricity. That is 1/5th of the electricity, it will need to be on for 50 hours to use as much as a 1 Kilowatt fire left on for one hour. This will reduce your electric bill but the bulbs are more expensive than old 100watt bulbs (but the energy efficient bulbs last 6-8 times longer! so this balances out).


What is the power rating for a light bulb in one hour?

The power rating of a light bulb is measured in watts (W), which represents the amount of electrical energy it consumes per unit of time. If a light bulb has a power rating of 60 watts (for example), it means it consumes 60 watt-hours of energy in one hour of operation.


Why are CFL's more efficient than conventional electric bulbs?

we should use CFL as they do not produce heat energy thus saving electricity. After using CFL for an hour we can remove it bare hand as per proving that CFL's do not produce large amount of heat energy. Thus saving electricity and reduces bill..!


How many watts do light-bulbs use per hour?

Your question is rather like asking, 'How many miles per hour do you do in one hour?' A watt is simply the rate at which you use energy or do work, and it is the same regardless of over what period it is measured.


What are kilowatt-hours and what is their common use?

A KW is an amount of power and the hour is how long you use it for , 1 kwh from the power company will cost about 20 cents and run about 15 light bulbs for 1 hour


What energy is wasted from a lamp?

In a lamp, the energy that is wasted primarily comes in the form of heat. Incandescent light bulbs, for example, waste a significant amount of energy as heat due to the inefficiency of converting electricity into light. This wasted heat energy contributes to the overall inefficiency of traditional incandescent bulbs compared to more energy-efficient options such as LED or CFL bulbs.


Which bulb lasts longer an incandescent light bulb or a compact fluorescent light bulb?

A regular incandescent bulb uses a lot more energy than a compact fluorescent to produce the same amount of light. Most energy used by an incandescent bulb is wasted as heat which does not give off visible light. Incandescent bulbs are cheaper to buy, but they have shorter lifetimes than other alternatives.


Watt hour efficiency?

The Watt hour efficiency is the ratio of the amount of energy available during the discharge of an accumulator to the amount of energy put in during charge.


When are you going into light speed?

Light travels at 300,000 metres per second, about 1 million kilometres per hour, or about 671,000 miles per hour. Matter, including humans, cannot travel at light speed as it would require an infinite amount of energy.


Are halogen bulbs more energy efficient than traditional incandescent bulbs?

Well, if they're both 40 watt bulbs they use the same amount of electricity. But incandescent bulbs produce a lot of heat as well as light. Fluorescent bulbs don't produce (much) heat, so they can use their power to produce light. So you can use fluorescent bulbs of lower wattage to produce the same amount of light.So for the same amount of light, fluorescent bulbs use less electricity than incandescent bulbs.


How many kilowatts would a 400watt light use in a hour?

A 400-watt light uses energy at the rate of 0.4 kilowatt. In 1 hour, it uses 0.4 kilowatt-hour of energy.