Cost of using a 100W light bulb for one hour?

Cost of using a 100W light bulb for one hour?
by

1 Answer

Answer :

First you have to know the price for 1 kWh. Suppose it was 12 cents. That is usually written .1200 per kWh. Or, 12 cents to use a 100 watt bulb for 10 hours. Because 10 x 100= 1,000 So, it would be 10% of 1 kWh. And also 10% of the cost per kWh which is 12 cents. So, 1 hours use is 1.2 cents in this example.
by

Related questions

Two bulbs of 100w and 40w respectively are connected in series across a 230v supply which bulb will glow bright and why?

Description : Two bulbs of 100w and 40w respectively are connected in series across a 230v supply which bulb will glow bright and why?

Last Answer : A:Since two bulbs are in series they will get equal amount of electrical current but as the supply voltage is constant across the bulb(P=V^2/R).So the resistance of 40W bulb is greater and voltage across 40W is more (V=IR) so 40W bulb will glow brighter.

Two bulbs of 100w and 40w respectively connected in series across a 230v supply which bulb will glow bright and why?

Description : Two bulbs of 100w and 40w respectively connected in series across a 230v supply which bulb will glow bright and why?

Last Answer : Since two bulbs are in series they will get equal amount of electrical current but as the supply voltage is constant across the Bulb (P=V^2/R).So the resistance of 40W bulb is greater and voltage across 40W is more (V=IR) so 40W bulb will glow brighter.

Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains? a. 40 W bulb b. 60 W blub c. 100 W blub d. all will burn equally brightly

Description : Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains? a. 40 W bulb b. 60 W blub c. 100 W blub d. all will burn equally brightly

Last Answer : a. 40 W bulb

There are three bulbs of 60W 100W and 200W which bulb has thickest filament. a. 100W b. 200W c. 60W d. All

Description : There are three bulbs of 60W 100W and 200W which bulb has thickest filament. a. 100W b. 200W c. 60W d. All

Last Answer : b. 200W

A 100-watt light bulb is left on for 10 hours. Electricity is 10 cents per kilowatt-hour. How much did it cost to operate the light bulb?

Description : A 100-watt light bulb is left on for 10 hours. Electricity is 10 cents per kilowatt-hour. How much did it cost to operate the light bulb?

Last Answer : ANSWER: 10 CENTS

A homeowner replaces a 65 watt incandescent bulb with a 15 watt compact fluorescent lamp. The light is on 2000 hours a year. If electricity cost 10 cents a kilowatt-hour, how much money is saved on the electric bill in one year? w) $50.00 x) $10.00 y) $5.00 z) $1.00

Description : A homeowner replaces a 65 watt incandescent bulb with a 15 watt compact fluorescent lamp. The light is on 2000 hours a year. If electricity cost 10 cents a kilowatt-hour, how much money is saved on the electric bill in one year? w) $50.00 x) $10.00 y) $5.00 z) $1.00 

Last Answer : ANSWER: X -- $10.00 

How much energy does a light bulb uses every hour?

Description : How much energy does a light bulb uses every hour?

Last Answer : What is the answer ?

Can I put a 26 Watt energy saver (Equivalent to 100W) in a 60 Watt max lamp?

Description : Can I put a 26 Watt energy saver (Equivalent to 100W) in a 60 Watt max lamp?

Last Answer : yes. It’s equivalent in how much light it gives off compared to a 100W incandescent bulb. Those get much hotter.

250V 100W written on the lamp , what does it mean ?

Description : 250V 100W written on the lamp , what does it mean ?

Last Answer : 100W power loss if an electric lamp is supplied within 250V and runs for 1 hour .

An AM transmitter is rated 100W at 100% modulation. How much power required for the carrier? A. 33.33 W B. 66.66 W C. 83.33 W D. 100 W

Description : An AM transmitter is rated 100W at 100% modulation. How much power required for the carrier? A. 33.33 W B. 66.66 W C. 83.33 W D. 100 W

Last Answer : B. 66.66 W

When maximum power transfer to load is a) 20 W b) 50 W c) 100W d) 0W

Description : When maximum power transfer to load is a) 20 W b) 50 W c) 100W d) 0W

Last Answer : Ans: 0W

Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f? a. 40 W b. 90W c. 100W d. 120W

Description : Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f? a. 40 W b. 90W c. 100W d. 120W

Last Answer : b. 90W

A lamp of 100W at 200V is supplied current at 100 volts. It will be equivalent to the lamp of:

Description : A lamp of 100W at 200V is supplied current at 100 volts. It will be equivalent to the lamp of:   a. 50W b. 40W c. 25W d. 10W 

Last Answer : A lamp of 100W at 200V is supplied current at 100 volts. It will be equivalent to the lamp of: 25W

Two 100W, 200V lamps are connected in series across a 200V supply. The total power

Description : Two 100W, 200V lamps are connected in series across a 200V supply. The total power consumed by each lamp will be in Watts

Last Answer : 4800

According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in _____. A. 1 Hour B. 5 Hours C. 8 Hours D. 10 Hours

Description : According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in _____. A. 1 Hour B. 5 Hours C. 8 Hours D. 10 Hours

Last Answer : ANSWER: D

According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in _____. A. 1 Hour B. 5 Hours C. 8 Hours D. 10 Hours

Description : According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in _____. A. 1 Hour B. 5 Hours C. 8 Hours D. 10 Hours

Last Answer : ANSWER: D

Which one of the following is true to estimate the range of cooling tower? a) Range = cooling water inlet temperature – wet bulb temperature b) Range = cooling water outlet temperature – wet bulb temperature c) Range = heat load in kcal per hour / water circulation in lines per hour d) None of the above

Description : Which one of the following is true to estimate the range of cooling tower? a) Range = cooling water inlet temperature - wet bulb temperature b) Range = cooling water outlet temperature - wet bulb temperature ... = heat load in kcal per hour / water circulation in lines per hour d) None of the above

Last Answer : Range = heat load in kcal per hour / water circulation in lines per hour

How much heat does a 40 W bulb generates in one hour? a. 144000J b. 144J c. 1.44J d. 14J

Description : How much heat does a 40 W bulb generates in one hour? a. 144000J b. 144J c. 1.44J d. 14J

Last Answer : a. 144000J

Moisture damage, as a result of condensation occurring inside of the cargo winch master switches, can be reduced by __________________. A. installing a light bulb in the pedestal stand B. coating the switch box internals with epoxy sealer C. venting the switch box regularly D. using strip heaters inside the switch box

Description : Moisture damage, as a result of condensation occurring inside of the cargo winch master switches, can be reduced by __________________. A. installing a light bulb in the pedestal stand B. coating the ... epoxy sealer C. venting the switch box regularly D. using strip heaters inside the switch box

Last Answer : Answer: D

What should I do when a CFL light bulb shatters?

Description : What should I do when a CFL light bulb shatters?

Last Answer : see this link

Is an 800-lumen light bulb twice as bright as a 400-lumen one?

Description : Is an 800-lumen light bulb twice as bright as a 400-lumen one?

Last Answer : A lumen is a measure of brightness. In America, incandescent bulbs used to be rated by “candlepower. ” The LED bulbs are much brighter, and are measured by “lumens.” The wattage is not as big a variable, as the brightness. There are conversions for candlepower to lumens online.

Can I replace a 60 watt incandescent light bulb with a fluorescent or LED bulb that puts out more light than the incandescent?

Description : Can I replace a 60 watt incandescent light bulb with a fluorescent or LED bulb that puts out more light than the incandescent?

Last Answer : Light output is measured in lumens, and yes, you can find a fluorescent bulb in lumen output equal to or greater than an incandescent 75 or 100 watt bulb.And it won’t be anywhere near 60 watts, so you are safe.

How many Penguins does it take to change a light bulb?

Description : How many Penguins does it take to change a light bulb?

Last Answer : A colony. They’re so short it takes a lot standing on each others’ shoulders.

★ In the US, our history books tell us we invented almost everything. Do other countries recognize the US as inventing the car, light bulb, phone, computer, refrigerator, plane, steam engine, and the Internet? Or do they claim any of them too?

Description : ★ In the US, our history books tell us we invented almost everything. Do other countries recognize the US as inventing the car, light bulb, phone, computer, refrigerator, plane, steam engine, and the Internet? Or do they claim any of them too?

Last Answer : None of those things are singular, out of the blue, inventions. They were all built upon many smaller, earlier inventions.

How many jellies does it take to change a light bulb?

Description : How many jellies does it take to change a light bulb?

Last Answer : Three. One to take the old one out; another to insist on putting it back in; and a third to argue that there’s no point in arguing. The light remains unchanged..

Is it normal for a light bulb to break and hang from the light fixture by a wire?

Description : Is it normal for a light bulb to break and hang from the light fixture by a wire?

Last Answer : answer:Incandescent bulbs? If so, then yes, they often do that. Turn off the light switch when unscrewing them. If you can’t get the base out, a potato (or in my case a pliers) can assist in getting out the remains. Did you by any chance buy really cheap bulbs?

Is it a good idea to microwave a light bulb?

Description : Is it a good idea to microwave a light bulb?

Last Answer : I’m gonna’ have to go with… NO.

I need to install a new light bulb on a high ceiling. What are those things called that allow you to reach the cieling and install a lightbulb?

Description : I need to install a new light bulb on a high ceiling. What are those things called that allow you to reach the cieling and install a lightbulb?

Last Answer : A…...ladder?

What happens when you place a three way light bulb into a two way socket? Will it work as a Three way?

Description : What happens when you place a three way light bulb into a two way socket? Will it work as a Three way?

Last Answer : IIRC, only one of the filaments will light, instead of both. I believe it’s the brighter one, based on what happens when you plug a normal bulb into a 3-way socket. Shouldn’t break anything

How do you change a scb1000 advantium microwave oven's light bulb?

Description : How do you change a scb1000 advantium microwave oven's light bulb?

Last Answer : Here’s a tutorial on how to replace the lamp. Good Luck!

What light bulb, for home use, lasts the longest?

Description : What light bulb, for home use, lasts the longest?

Last Answer : The Sun… Rumor has it it should last around a thousand years. Free and works in most places here on Earth. Your millage might very….. Best light bulb I know of….

Which energy saving light bulb...

Description : Which energy saving light bulb...

Last Answer : Lamp maximum wattage is based on amperage, and probably heat output, although with non-halogen bulbs that's not so much a problem.

How many Ask-publics does it take to screw in a light bulb?

Description : How many Ask-publics does it take to screw in a light bulb?

Last Answer : What exactly do you mean?

Can a full spectrum light bulb serve the same purpose as a grow bulb?

Description : Can a full spectrum light bulb serve the same purpose as a grow bulb?

Last Answer : The term full spectrum is misleading. In truth, it is about as informative as the label lower calories on a food product. (Lower calories than what?) Full spectrum lighting is ... categories is impossible, comparing one specific bulb to another specific bulb would be difficult but more fruitful.

Question about tail lights on a car and light bulb.

Description : Question about tail lights on a car and light bulb.

Last Answer : um… Red + blue [equal] purple ?

What kind of light bulb should I buy for my aquarium?

Description : I went to the store to buy a new light bulb for my aquarium - the old one burn out. There are so many different types. What's the best one? I have a 60 gallon tank.

Last Answer : A 60 gallon tank usually uses a 48" fixture and bulb. Check the code printed on the fixture to make sure the diameter of the bulb will be the right fit. As with most purchases, you almost always get what you pay for, so quality should be your guide.

Can one bird change a light bulb? -Riddles

Description : Can one bird change a light bulb? -Riddles

Last Answer : No, but toucan!

How many programmers does it take to change a light bulb? -Riddles

Description : How many programmers does it take to change a light bulb? -Riddles

Last Answer : None. It's a hardware problem.

I you don't move I move, if you move I still move. I can shine but am not a light bulb. I will fall before you wake up. What am I? -Riddles

Description : I you don't move I move, if you move I still move. I can shine but am not a light bulb. I will fall before you wake up. What am I? -Riddles

Last Answer : The Moon.

there are 3 light bulbs in three seperate rooms. in front of you, there is a panel with 3 seperate switches. they only turn on or off. you may look inside each room only once. how can you tell which bulb belongs to which switch? -Riddles

Description : there are 3 light bulbs in three seperate rooms. in front of you, there is a panel with 3 seperate switches. they only turn on or off. you may look inside each room only once. how can you tell which bulb belongs to which switch? -Riddles

Last Answer : you turn on any two switches, leave them for a few minutes, and turn one off. you enter each room only once. you know that the lightbulb that is lit beongs to the switch that was left on, the ... hot, belongs to the switch you turned off, and the cold bulb belongs to the switch you never touched.

There are 100 light bulbs lined up in a row in a long room. Each bulb has its own switch and is currently switched off. The room has an entry door and an exit door. There are 100 people lined up outside the entry door. Each bulb is numbered consecutively from 1 to 100. So is each person. Person No. 1 enters the room, switches on every bulb, and exits. Person No. 2 enters and flips the switch on every second bulb (turning off bulbs 2, 4, 6, ...). Person No. 3 enters and flips the switch on every third bulb (changing the state on bulbs 3, 6, 9, ...). This continues until all 100 people have passed through the room. What is the final state of bulb No. 64? And how many of the light bulbs are illuminated after the 100th person has passed through the room? -Riddles

Description : There are 100 light bulbs lined up in a row in a long room. Each bulb has its own switch and is currently switched off. The room has an entry door and an exit door. There are 100 people ... And how many of the light bulbs are illuminated after the 100th person has passed through the room? -Riddles

Last Answer : First think who will operate each bulb, obviously person #2 will do all the even numbers, and say person #10 will operate all the bulbs that end in a zero. So who would operate for example bulb 48: Persons numbered: 1 & 48 ... 100 (1, 4, 9, 16, 25, 36, 49, 64, 81 & 100) hence 10 bulbs remain on.

There is a lamp inside a photography darkroom. When the darkroom door is closed, it is impossible to tell from outside the room whether or not the lamp is on. There are two switches outside the door of the darkroom. One or both of the switches may control the lamp. It also could be that neither of the switches control the lamp. All you know is that the light bulb is currently off and that the lamp and bulb are in working condition. The darkroom door is closed and once you open the door you cannot touch either of the switches. If you can only open the dark-room door one time, how can you tell which switches, if any, control the lamp? -Riddles

Description : There is a lamp inside a photography darkroom. When the darkroom door is closed, it is impossible to tell from outside the room whether or not the lamp is on. There are two switches outside the door of ... dark-room door one time, how can you tell which switches, if any, control the lamp? -Riddles

Last Answer : Turn the first switch on and leave it on for ten minutes. After ten minutes, turn that switch off and turn the second switch on. Open the darkroom door, and lightly (in case it is hot) touch the ... one controls the lamp. If the lamp is off, and the bulb is cool, neither switch controls the lamp.

If you screw a light bulb into a socket by turning the bulb toward the right with your right hand, which way would you turn the socket with your left hand in order to unscrew it while holding the bulb stationary? -Riddles

Description : If you screw a light bulb into a socket by turning the bulb toward the right with your right hand, which way would you turn the socket with your left hand in order to unscrew it while holding the bulb stationary? -Riddles

Last Answer : To the right. It's always the same direction.

Where to throw the old light bulb?

Description : Where should the bad ones go?

Last Answer : "The traditional filament is trash, I drop the pine and pine in the electrician's shop when I go for a new one."

Energy saving light bulb in 60W watts?

Last Answer : "60W = 5-700 lumens. Of the links, 12W is 700 lumens, so it's about 60W."

Who invented the light bulb and when did he invent it?

Description : When was the light bulb invented and who was the inventor?

Last Answer : Thomas Alva Edison's 1879 patent is considered his first light bulb, but like many things, Edison cheated on it. Because of the research done by many of his fellow scientists, he reaped the laurel (he has thousands of patents in his name) and had to steal the ideas / inventions of others.

Do you know of a reliable cool white light bulb with an E27 socket?

Description : I want around 400-800 lumens, which lasts a long time and is preferably not too expensive.

Last Answer : We have THIS in the living room, 5 can fit in the chandelier. The room is floating in it in a rather rough flood of light. I don't know how durable it is because it's only about. We have been ... bad. It's still that ours is a small socket, but I don't think it changes the technical features. 

Will the light bulb last?

Description : Classic light bulb 100 w, can it last even in frost?

Last Answer : You can't get a classic 100 W light bulb anymore, but it will last, I have tried it. I had it over the door to see the way to the gate .......

Will the light bulb in the microwave be on?

Description : Can't I destroy the oven like that?

Last Answer : No - shine - metal fiber with oscillations elmg. the field heats up and melts. If you turn on the microwatch only for a "moment", nothing will happen to it (or you will take off the thread metal). If for a long time, a more massive metal thread can destroy it.

Can a cigarette be lit from a light bulb?

Description : I haven't smoked in front of my girlfriend for a year. If she finds a lighter with me, she'll scold me. We're going to the cottage together. The only way to light it is to spin the cigar from the light bulb. Do you think that will work? If I let a 100 watt shine for 20 minutes? Thanks

Last Answer : a little off topic, but related: I would send a girlfriend to the kale if she walked in my pockets. It's just not done, even the pockets of jackets or pants are a privacy that is ... briefcases. the exception is, of course, checking the bags before putting them in the washing machine. (tuxedo)