Domestic circuit connection & fuse - Domestic circuit (Part 2) | Physics | Khan Academy 

I watched the recorded video and it was helpful. Ans of home work question- 1. In our house we have parallel circuit connection because in parallel connection all the appliances get same voltage⚡️ as that of supply line as well as the overall resistance of rhe household circuit gets reduced and even high power rating appliances can work properly. 2. We use a fuse as a safety device. It is used to safeguard our electic domestic circuit. It is connected in series with the circuit. Two important properties that a fuse wire must have are- A very high resistance, this because it has to resist the flow of extra current than the prescribed specified amount in the circuit. A low melting point, this is because it follows Joule law of heating and has to break the circuit when current exceeds specified value. 3. We need to maintain 2 separate circuits one for low power devices and one for high power devices because the current drawn by both of them are of different in magnitude. And in order to safeguard our domestic circuit we need separate circuit for low power rating and high power rating devices. 4. Bonus question ans- The fuse is always connected to the live wire not with the neutral wire because we know the current in circuit entres from live wire and leaves from neutral wire and the live wire has 220 volts but neutral wire is ground and has potential of 0 volts. So if we would have connected the fuse in neutral wire then it still would have not proved to be helpful in any case because the devices connected can still draw current though then via live wire for a certain amount of time. This would damage the appliances. Therefore, fuse are connected in live / active wires not neutral. Thankyou. 🙏🙏

That's what we can call a perfect explanation for this topic. Thanks a lot sir. I wish all schools and colleges had teachers like you.

the fuse is always connected to the active wire because, if it is connected to the neutral wire, and suppose the circuit disconnects, then the devices will STILL have connection to the power sources for a brief amount of time, and they will still be able to draw some current, and this can damage the devices. whereas, if in the same case, if the fuse is connected to the active wire, then when the circuit breaks, the devices will NOT have connection to the power source and they will not be able to draw current. is it correct? lol anyways, thanks for all of your videos, they are very helpful!

Thanks a lot sir for your deedful explanation . It was really mind blowing explanations . so thanks a lot again

....Comparing is a good way for clarification.... The Indian electrical system is great, for understanding the American electrical system.....Thanks for sharing this video....It would be great if all major electrical systems were clarified, in any kind of lesson for a better comprehensive understanding... As is the case with all kinds of issues......

Aur aaj tak kabhi maine kisi video pe Aisa comment nahi kiya... But,, I"LL just say today... The way you explained is Awesome 🙂 I just got everything...

THIS IS THE DEFINITION OF UNDERSTANDABLE

Helping me to understand basics idea which is very important

4:59 nice twist 😁

Very helpful explanation, I was surprised for how simple are those types of circuits

It was a life changer when I discovered this wonderful channel... You're my fav phy teacher after aanand srinivas :P sir

I wonder why Khan Academy is underrated! Why?

cant thank khan academy enough.

You are a blessing sir ❣️🙏😘

Perfect explanation sir. We are expecting lot of videos from you.👏👏👏

Very good teacher. You give solid yet simplified and easy to understand answers to your WHY questions. Interesting and very informative. Thank you.

What a gem, thank you sir.

Achha video hai from Khan academy

Excellent explanation! So easy to understand Very very clear. God bless!

awesome content it was really good.

So well explained! Beautiful

It's super clear to me right now. Thanks for video

Very nice, thank you, sir!

Very much cleared!!!

Explaination was wonderful sir. Thank you sir.

Great Explatinition

Awesome explanation sir...... i am sure it must have taken a lot from tour side to make such a animated circuit.... A big thanks for your efforts🫶🏻

Very Nice explained 👍 Thank You So much Sir

Thanks sir for this useful knowledge👍👌

Thanks sir I can explain all ans of each question to my friends . And your bonus questions also. THANKS A LOT SIR

Thank you sir

Best explanation 👌

Thanks a lot . Good explanations👍🏻

Sir who ever you are where ever you are I love you sir as a student. I was just checking randomly and saw you video thank you so much

Woow amazing explanation.

thats how a teacher should teach...

It was helpful sir thank you sir 😊

Just one word ' PERFECT' 👏

YOU SAVED MY LIFE ❤️❤️❤️✨✨✨✨

the fuse is never connected to the neutral wire just because if due to high terminal voltage or short circuit or even overloading of current in the circuit excess current flows through the neutral wire, the temperature of the fuse increases and upon reaching its melting point, it blows off and current immediately stops flowing into the circuit , but , here comes the trick, the live wire still remains connected to the appliance and as we know the live wire is connected to the main point of high potential supply(also called mains), and thus current still flows into it and any person touching the faulty appliance will get as u said sir, a nasty shock 😁😁, btw your teaching is too superb, hope i could touch your feet someday

Great!!

Really awesome sir I like the way of your teaching

Thank you Shenoy Sir 😃

Your explanation is superb sir

Beautiful!

Wonderful explanation sir thanks

Thank you sir✨

Teaching is better than schools. Practical learning is the best

Excellent teaching. Thanks.

Reason why the fuse is connected to the live wire : Because if we connect fuse to the neutral wire and in case of high voltage supply , the fuse would melt. But the potential difference would still exists across the device(i.e. potentiality at live wire would be more than +/-220v and potentiality at neutral wire would be 0v) so the current still flows and the device might be destroyed. And if we connect the fuse to the live wire , and during high voltage supply the fuse melts and the potential difference across the device will be the same(i.e. 0v potentiality in both the wiers) so the current would not flow and the device is safe Please reply if I am right 🙏

The fuse is always connected in the life wire of the circuit because if the fuse is put in the neutral wire then due to excessive flow of current when the fuse burns current stop flowing in the circuit but the appliances remain connected to the higher potential point of the supplied through the live wire now if a person touches the appliances he may get a shock as the person will come in contact with the live wire through the appliances.

Thank you so much. Sir

Thank you very much

Awesome👌

Superb sir 👌👌

Thanks a lot sir🤩🤩🤩🤩

No doubts sir!

Best explanation!

Transformers with load, single phase three phase ke videos v dal do sir plss😅

Man this guy won my heart 💓

Finally Understand It.. 🙏🏻🙏🏻💯 These are some basic things which every person should know, but our books doesn't have this much practical approach

Wowww❤❤❤❤❤❤❤what a nice explanation

Nicely explained

Eagely waiting for more videos of tbis series😍😍😍

Great

😍😍I just loved the way u explain the lessons. thanks a lot sir,

as the fuse is basically used to stoP the flow of current if there an excess flow of current..so when excess power is suPPlied by the main the current first flows through the red wire..and then through electric aliance and then back through neutral wire...so so as to let the fuse melt before the current reaches the circuit it is connected to red wire

THANKS THANKS

Your phase/hot/live/positive and neutral/negative are reversed (Polarity reversed). The former (control by switch) should always be on the right side of the socket while the latter should always be on the left side of the socket.

Thankyousomuch sir!!!!

Yes sir

Sir upload class 11th and 12th bio too

Sir your voice resembles that you are still young. what is your name and Age?

isnt the phase and neutral are reveresed.i meant phase should be At left and neutral at right

My doubt was why the current keeps alternating between live and neutral wire

👏👍

Fuse are always connected with live..wire...this current carrier wire... through live..pole to device & through neutral wire... device to pole

Where can i confirm the amswers?

Hey can u plz make the circuit by use all gates ???? And describ it

I think if the fuse is connected to the neutral,, the devices will be the first to melt before the the fuse melt....

❤️❤️❤️

5:01 nice twist😂

Sir when circuit is completed with neutral wire which is taking back the current...then why we are saying that neutral wire has no current and there is no harm to touch neutral wire..when we are seeing here that neutral wire is bringing back the current...kindly reply

Sir there are two more holes in the socket. What is the purpose of them?? Plz reply

What an amazing explaination!

1.Parallel bcoz the appliances are independent of other appliances. Also, the equivalent resistance in parallel is less, & also The same voltage is applied to all appliances 2.Fuse is basically a wire (made from alloy of( Pb + Sn) , whose main function is to Melt when high current Passes through the circuit. It's conditions are - it should have high resistance so that it can oppose the incoming current - it should have low m. p. So that it can easily melt! Fuses & Switches are present in contact with live wire as when the circuit breaks, the appliances is not connected to high potential.. While, if we connect it through neutral wire, the appliances is still connected to high potential... Hence a person could get Shock. PS- new here.. And literally found this channel amazing

just for clarification, a person is safe to touch 20,000 volts as long as power supply is low. P=VI so a person can touch a high voltage. The key thing here is that the power supply to our house is high and p.d is low. Hence current supply is very high leading to shocks

What are those extra holes in the plug points for? I mean, apart from the three that are already mentioned..

🙏

4. Ans: fuse is connected to live wire because current entry point is through live wire wherein which high voltage can be restricted and leaves through neutral wire.

Is it just me or someone else is also thinking about this? Fuses are and should be of least resistance so no voltage drops occurs through it. fuses are highly resistant only when they are blown up . Because whenever we check fuse on multimeter we check it on short circuit beep mode. Please guide

Ans to bonus question: Live wire is the one that carries the current to the device so if you want to prevent overflow of current, then you have to connect a fuse to the live wire and not neutral one as it will already be damaged before current even enters the neutral one!

Sir please make this video in hindi please

Thanks sir, fuse is connected to live wire because if it is connected to neutral wire then the exceesive current will damage device first before the fuse wire melts which is connected to neutral wire

👍

Fuse connected with live wire because live wire has more potential like 220 volts so it is first which heated up or burn that's why fuse connect with live wire

Tantanta😁

1. Parallel because each appliance can be used independently. In case of short circuit in rest wires can be used. 2. A fuse should have a high resistance and should have a low melting point. 3. We need to maintain to separate circuit because there are appliances which draw more current. In case if we attach them with a circuit have a fuse which operates on low current then the fuse will melt and the circuit will break. To prevent this appliances drawing more current are attached in separate circuit have a fuse which operates on greater amount of current. 4. If we connect them in neutral wire and if the fuse melts than the current will pass through the ground wire. The purpose of fuse will get defeated and excess current will continue to flow. Thus it is connected in live and not in neutral wire.

Sir in 7:55 I think we need a high melting point by which it refuse the melting.

We connect fuse with live wire because the high electricity passing only from Live wire and it's make short circuit that's why it puts there