Energy and Power, What is the Difference?

20 Sep
2014

old-light-bulb

It seems that the two terms energy and power are often confusing for many people and as a result there could be misunderstandings regarding the energy consumed for a given period of time as well as how much energy is consumed by a device. Let us say that you have a device rated at 100W of power required for it to operate, for example a 100W light bulb that will run at this power level constantly in order to give light. But how much energy will the light bulb consume, that depends entirely on the time that you have it turned on it is turning energy to light. If you leave the light bulb running for 1 hour, then it would have consumed 100 Wh of energy and you would need to pay for that energy used. But if you leave the light bulb turned on for just 30 minutes it would have used just 50 Wh, or for 2 hours the energy used will be 200 Wh.

Do you get the difference between energy and power now? The power rating of an item describes how much power the device needs in order to operate, but the energy used by it will depend on the time that you have the device operating. Since we are normally paying per 1 kWh used energy then you can easily do the math for the energy consumption of a device when you know its power rating:

Device power rating * Time in hours the device is operating = Energy used that you need to pay for

So if we turn back to the example with the 100W light bulb we can get:

100W * 0.5 hour = 0.05 kWh (or 50 Wh)
100W * 1 hour = 0.1 kWh (or 100 Wh)
100W * 2 hours = 0.2 kWh (or 200 Wh)

Now if we multiply the result we got for the energy used by the rate for 1 kWh of energy we get what we need to pay for:

0.2 kWh * $0.15 USD = $0.03 USD

So that little example in the real world would have cost us just 3 cents if we have a rate of $0.15 USD per kilowatt hour of energy used.



Other Similar Publications:

31 Responses to Energy and Power, What is the Difference?

Avatar

Hosting

August 18th, 2017 at 07:08

The methods involves using a calorimeter, which measures the heat absorbed or released in chemical reactions or physical changes, thermometer, which measures temperature or bolometer that is employed to measure th e intensity of radiation. When calculating the real power consumption of an electrical device, it is essential to measure the voltage applied and the current consumed, taking into account the power that is dissipated in the circuit.

Avatar

citalopram 40mg

July 15th, 2018 at 14:43

citalopram 40mg

Avatar

ranitidine 150 mg

July 17th, 2018 at 13:46

ranitidine 150 mg

Avatar

ranitidine 150 mg

July 17th, 2018 at 16:40

ranitidine 300 mg

Avatar

ranitidine 300 mg

July 17th, 2018 at 17:09

ranitidine 150 mg

Avatar

ranitidine 300 mg

July 17th, 2018 at 18:21

ranitidine 300 mg

Avatar

meloxicam 7 5 mg

July 18th, 2018 at 07:30

meloxicam 15 mg

Avatar

meloxicam 15 mg

July 18th, 2018 at 07:51

meloxicam 7 5 mg

Avatar

meloxicam 15 mg

July 18th, 2018 at 08:13

meloxicam 15 mg

Avatar

meloxicam 7 5 mg

July 18th, 2018 at 08:52

meloxicam 7 5 mg

Avatar

naproxen 500 mg

July 19th, 2018 at 10:53

naproxen 500 mg

Avatar

stitch onesie hot topic

August 22nd, 2018 at 19:44

I’m not that much of a online reader to be honest but your blogs really nice, keep it up! I’ll go ahead and bookmark your website to come back in the future. Many thanks

Avatar

Neil Buvinghausen

August 25th, 2018 at 07:36

Undeniably believe that which you said. Your favorite justification seemed to be on the web the simplest thing to be aware of. I say to you, I certainly get annoyed while people consider worries that they plainly don’t know about. You managed to hit the nail upon the top as well as defined out the whole thing without having side-effects , people can take a signal. Will probably be back to get more. Thanks

Avatar

Sharmaine Carsno

August 26th, 2018 at 15:40

These are truly fantastic ideas in on the topic of blogging. You have touched some pleasant factors here. Any way keep up wrinting.

Avatar

kigurumi

August 29th, 2018 at 17:27

Why visitors still make use of to read news papers when in this technological globe all is existing on web?

Avatar

Jay Metzinger

August 29th, 2018 at 19:24

I have been browsing on-line more than 3 hours nowadays, but I by no means found any fascinating article like yours. It is beautiful worth enough for me. Personally, if all site owners and bloggers made just right content as you probably did, the internet shall be a lot more useful than ever before.

Avatar

adult stitch onesie

August 30th, 2018 at 20:14

Thanks for every other informative blog. Where else could I am getting that type of info written in such a perfect method? I have a undertaking that I am simply now running on, and I’ve been on the glance out for such information.

Avatar

ブランドコピー後払い

September 1st, 2018 at 06:46

Hey there! Do you know if they make any plugins to protect against hackers? I’m kinda paranoid about losing everything I’ve worked hard on. Any recommendations?

Avatar

代引き可能なスーパーコピー

September 1st, 2018 at 06:46

I am extremely impressed with your writing abilities as smartly as with the layout for your weblog. Is that this a paid theme or did you modify it your self? Either way stay up the excellent high quality writing, it’s rare to peer a great blog like this one nowadays..

Avatar

スーパーコピー代引き対応

September 1st, 2018 at 06:46

For newest news you have to go to see world wide web and on web I found this web site as a finest website for newest updates.

Avatar

スーパーコピー国内発送代引き

September 1st, 2018 at 17:50

Wonderful blog! I found it while searching on Yahoo News. Do you have any suggestions on how to get listed in Yahoo News? I’ve been trying for a while but I never seem to get there! Many thanks

Avatar

ブランドスーパーコピー後払い

September 1st, 2018 at 17:50

Hey just wanted to give you a quick heads up. The words in your content seem to be running off the screen in Firefox. I’m not sure if this is a format issue or something to do with browser compatibility but I figured I’d post to let you know. The design look great though! Hope you get the problem solved soon. Kudos

Avatar

ブランド コピー 安心

September 2nd, 2018 at 16:43

Have you ever considered creating an ebook or guest authoring on other blogs? I have a blog based on the same ideas you discuss and would love to have you share some stories/information. I know my subscribers would enjoy your work. If you’re even remotely interested, feel free to shoot me an e mail.

Avatar

スーパーコピー国内発送代引き

September 2nd, 2018 at 16:44

great publish, very informative. I’m wondering why the other experts of this sector don’t realize this. You should continue your writing. I am confident, you have a great readers’ base already!

Avatar

Mel Housley

September 4th, 2018 at 01:52

Fantastic goods from you, man. I have bear in mind your stuff previous to and you’re just too fantastic. I actually like what you’ve got here, certainly like what you are stating and the best way by which you are saying it. You’re making it enjoyable and you still care for to stay it smart. I can’t wait to read much more from you. That is really a wonderful site.

Avatar

スーパーコピー代引き安心

September 4th, 2018 at 17:56

Hi there, I enjoy reading through your post. I like to write a little comment to support you.

Avatar

ルイヴィトン財布コピー激安代引き

September 4th, 2018 at 17:56

Hi there, i read your blog occasionally and i own a similar one and i was just wondering if you get a lot of spam feedback? If so how do you protect against it, any plugin or anything you can advise? I get so much lately it’s driving me crazy so any support is very much appreciated.

Avatar

コピーブランド後払い

September 5th, 2018 at 05:13

Greetings! Very useful advice in this particular article! It’s the little changes which will make the greatest changes. Thanks a lot for sharing!

Avatar

ブランドコピー代引き

September 5th, 2018 at 17:34

I absolutely love your site.. Excellent colors & theme. Did you build this website yourself? Please reply back as I’m looking to create my own personal site and would love to find out where you got this from or exactly what the theme is named. Kudos!

Avatar

クロエスーパーコピー

September 6th, 2018 at 19:58

I have been browsing online more than three hours today, but I never found any fascinating article like yours. It is pretty value enough for me. In my opinion, if all site owners and bloggers made good content material as you probably did, the web will likely be much more helpful than ever before.

Avatar

CELINEバッグコピー

September 14th, 2018 at 20:08

Hello, I enjoy reading through your article. I wanted to write a little comment to support you.

Leave a Reply

Your email address will not be published. Required fields are marked *

top