## Introduction Electromotive force

Electromotive force (EMF) is considered under electromagnetism which is one of the basic concepts. EMF helps us to understand the process of electromagnetism. Besides, it is an important concept that is associated with the concept of voltage. Moreover, The EMF is the total energy from an energy source such as a battery or a cell. This is the way to pass energy from one source to another source. We can consider it a cell per coulomb (Q). This is the charge that is passing through it.

## EMF formula:

**e = E/Q**

Where, e = emf or electromotive force and Q denotes charge (Coulombs), and E denotes energy in joules.

We can write this formula in different ways, such as

E=IR+ lr

e represents the EMF in volts

I is current in Ampere

R is the load resistance

R is considered as an internal resistance in ohms

Basically, it is the force between both the terminal of the energy source when no current is flowing through it.

We can understand it using examples as well.

**Example:**

Find the terminal potential difference of a cell when it is connected to a 9-ohm load with cell emf = 2 Volts and internal resistance is 1 ohm?

Answer:

As per the question, it gives

Emf=2

Internal resistance = 1 ohm and

External resistance = 9 ohm

We can calculate current using this formula

I = V/R

Where R is the sum of external and internal resistance,

So R is 10 ohm

Thus, I = 2/10 = 0.2 A

Now we should find V using this formula

E = V + Ir

So V = E + Ir

V= 2 + (0.2) 1

V= 1.8 Volts

Example Consider an electrical circuit with a potential difference of 5V, with a current of1 A. If the internal resistance of the battery used is 0.8 ohms. Then, determine the EMF of the circuit using the EMF formula.

According to the question,

Current is 1 Ampere

The potential difference is 5 volts

Internal resistance is 0.8 ohms

The formula for calculating EMF is

ε = V + Ir

Thus,

ε = 5 + (1*(0.8)) = 5.8 volts

therefore, the emf in that circuit is 5.8 volts.

In conclusion, EMF is the force between two terminals of an energy source when the current is not flowing between any circuit. The total resistance will be an addition of internal and external resistance. Moreover, we can find voltage and current in a circuit as well using that formula. Finally, it is an important concept in physics.

### FAQs (Frequently Asked Questions) about Electromotive force

Ques: What is the EMF formula?

Ans: the formula for calculating emf is

ε = V + Ir

Where,

I – The total current flowing in the circuit

V – The total potential difference developed in the circuit

r – The internal resistance of the battery

Ques: What is the unit of EMF?

We can measure the EMF in volts.

Ques: How can we calculate the total resistance for a circuit?

Ans: we should sum of both internal and external resistance to calculate the total resistance.

Ques: What is the difference between potential difference and EMF?

Ans: there is some basic difference between emf and potential factor which is based on the circuit and different parameters.

Why should you be eating Organic Food?

DSSSB Recruitment 2022 for 547 Manager, Deputy Manager, TGT, PGT, Store Attendant, Accountant and Other Posts

APH

Hi are using WordPress for your blog platform? I’m new to the blog world but I’m trying to get started and create my own. Do you need any coding knowledge to make your own blog? Any help would be really appreciated!

Hey! This is my first comment here so I just wanted to give a quick shout out and say I genuinely enjoy reading your blog posts. Can you suggest any other blogs/websites/forums that cover the same topics? Thanks a lot!

Yes you can visit other blogs for more information. you can choose http://www.assignmentprojecthelp.com

Have you ever thought about adding a little bit more than just your articles?

I mean, what you say is valuable and everything.

But just imagine if you added some great pictures or videos to give your posts more, “pop”!

Your content is excellent but with images and video clips,

this site could certainly be one of the best in its field.

Terrific blog!

Hmm is anyone else having problems with the pictures on this blog loading?

I’m trying to find out if its a problem on my end or if it’s the blog.

Any feed-back would be greatly appreciated.

You ought to be a part of a contest for one of the finest blogs on the web.

I most certainly will highly recommend this site!

whoah this blog is fantastic i really like studying your articles.

Stay up the good work! You understand, a lot of persons are

looking around for this info, you can help them greatly.

Pretty nice post. I just stumbled upon your weblog and wished to say that I’ve really loved browsing your blog posts.

After all I will be subscribing on your feed and I’m hoping you write once

more soon!

It’s the best time to make some plans for the longer term

and it’s time to be happy. I have learn this post and

if I may I want to recommend you some interesting things

or suggestions. Maybe you can write subsequent

articles relating to this article. I wish to read more

issues about it!

What’s Going down i’m new to this, I stumbled upon this I have discovered It absolutely helpful and it has aided me out loads.

I hope to contribute & aid other customers like its aided me.

Good job.

Ahaa, its nice dialogue about this post here at this blog,

I have read all that, so at this time me also commenting here.

Very nice post. I simply stumbled upon your blog and wanted

to say that I have really loved surfing around your weblog posts.

After all I will be subscribing for your rss feed and I

am hoping you write once more soon!

It’s very simple to find out any matter on web as compared to books, as I found

this paragraph at this site.

You actually make it appear really easy with your presentation however I find this topic to be really something which I believe I might

by no means understand. It kind of feels too complex and extremely broad for

me. I am having a look ahead to your subsequent submit,

I will try to get the dangle of it!

For the reason that the admin of this site is working, no uncertainty very quickly it will be renowned, due to its quality contents.

Hi there, yes this post is truly good and I have learned lot of things from it on the topic of

blogging. thanks.

My partner and I stumbled over here from a different page and thought I should check things out.

I like what I see so now i am following you. Look forward to looking over your web

page again.

Hey I know this is off topic but I was wondering if you knew of any widgets I could add to my blog that

automatically tweet my newest twitter updates. I’ve been looking for a plug-in like

this for quite some time and was hoping maybe you would have some experience with something like this.

Please let me know if you run into anything.

I truly enjoy reading your blog and I look forward to your new updates.

Usually I do not learn article on blogs, but I wish to say that

this write-up very pressured me to check out and do it! Your writing style has been surprised me.

Thanks, very great article.

Hi there, I found your site by means of Google while searching for a similar

subject, your site came up, it seems to be great.

I have bookmarked it in my google bookmarks.

Hello there, simply turned into alert to your blog through Google, and located that it

is truly informative. I am going to watch out for brussels.

I’ll appreciate when you proceed this in future.

Lots of other folks will be benefited from your writing. Cheers!

Hey there! I know this is sort of off-topic however I had to ask.

Does operating a well-established blog like yours take a

lot of work? I am brand new to running a blog but I do write in my journal daily.

I’d like to start a blog so I can share my experience and thoughts online.

Please let me know if you have any suggestions or tips

for brand new aspiring blog owners. Thankyou!

Pretty component to content. I simply stumbled upon your weblog and in accession capital to say

that I get in fact enjoyed account your blog posts. Any way I’ll be subscribing to your augment or even I achievement you get admission to consistently fast.

Pretty! This was an incredibly wonderful post. Thanks

for supplying these details.

Hello to all, how is the whole thing, I think every one is getting more from this website, and

your views are pleasant for new people.

I am truly thankful to the owner of this web site who has shared this fantastic piece of writing at at this place.

Very shortly this web page will be famous amid all blog people, due to it’s good articles

I would also like to add if you do not already have got an insurance policy or maybe you do not form part of any group insurance, you could well make use of seeking assistance from a health insurance broker. Self-employed or those with medical conditions typically seek the help of an health insurance specialist. Thanks for your post.

Hello to every body, it’s my first pay a visit of this blog;

this web site carries awesome and really good material

designed for readers.

Good way of telling, and pleasant article to take data on the topic of my

presentation subject, which i am going to deliver

in college.

I think the admin of this website is genuinely working hard

in favor of his web site, for the reason that here every information is quality based information.

Good day! 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 suggestions?

This is very interesting, You are a very skilled

blogger. I have joined your rss feed and look forward to seeking

more of your wonderful post. Also, I’ve shared your site in my social networks!

very interesting, but nothing sensible

Awesome! Its genuinely remarkable post, I have got much clear idea regarding from this post.

Awesome! Its genuinely remarkable post, I have got much clear idea regarding from this post

Great information shared.. really enjoyed reading this post thank you author for sharing this post .. appreciated

If you make it to the interview stage most employers will have looked you up online.

Heya i am for the first time here. I found this board and I find It truly useful & it helped

me out much. I hope to give something back and help others like you helped me.

First off I want to say terrific blog! I had a quick

question that I’d like to ask if you do not mind.

I was curious to find out how you center yourself

and clear your thoughts prior to writing. I’ve had a

difficult time clearing my mind in getting my ideas out.

I truly do take pleasure in writing but it just seems like the first 10 to 15 minutes are usually lost just trying to figure out how to

begin. Any suggestions or hints? Kudos!