I will address this question in a video. You are right, the answer should be 4R for stretched wire but the problem is that the statement of problem is saying that the length of wire is increased which is implying that only length is increased by keeping area constant.
Sir wuestion 23 me resistivity ta unchanged rahe gi..and if we are talking about resistance then the answer should be 4R cuz although they've mentioned only about length increment but area will automatically decrease twice so the overall resistance incread by the factor of four
Okay let me explain: 1. Agr beta decay hoga tou mass number change nhi hota because beta decay main neutron transfer hota hai proton main ya proton neutron main.. Isliye total number of neutrons+proton same rehta hai tou no change in mass. 2. Alpha decay main mass number decrease hota hai by 4 aur atomic number decrease hota hai by 2. 3. Jab neutron decay hota hai tou mass number decrease hota hai by 1 but atomic number same rehta hai.
Sir agr 23 me resistance keh raha hen ke stretch hogy to hum yaha R=n^2R =(2)2R =4R hoga na Hume ya parhya ha agr strach hogy wire to waha hm es formula se karengy
Let me explain: Jo aap keh rahi aesa isliye hota hai kyunki Resistance length k directly proportional hai aur wire k area k inversely proportional hai i.e R ∝ L and R ∝ 1/A Jab wire ko stretch karenge aur uski length increase (double) hogi aur area half hojayega kam hogi. Agr is tarah karenge tou new resistance 4R hojayegi Lekin us sawal main sirf context yeh hai k length increase ki hai with the assumption of same thickness isliye humne yeh consider nhi kiya k area main bhi change ayega
26;45 in case of stretched wire resistance is directly proportional to the sqaure of length.....
I will address this question in a video. You are right, the answer should be 4R for stretched wire but the problem is that the statement of problem is saying that the length of wire is increased which is implying that only length is increased by keeping area constant.
Thank you sooo much sir ❤❤❤❤
Sir wuestion 23 me resistivity ta unchanged rahe gi..and if we are talking about resistance then the answer should be 4R cuz although they've mentioned only about length increment but area will automatically decrease twice so the overall resistance incread by the factor of four
Yes this is what i thought
Great explained in short time
Nice video discussion
Kindly upload all past papers of Mdcat+ practice mcq discussion as well
Sir ager ap sare chapters ke formula bhi upload krein to humari bohot help jo kaye gi aur hume test mein easy hoga INSHA'ALLAH thank you sir
Great sir thanks alot 😊
Sir next video sai nums kei shro kr dain... Us ka test phlay hai na mdcat sai..
Sir is saal mdcat ke liye tyaare krwae is saal mdcat physics maen full marks aajaye plz sir batae kse tyaare krae bs sir plz ap
Sir kindly apload all past paper for ❤macat
Mashallah thank u very much sir
Sir plzz apka whatsapp number dai
Sir plz upload all nts past paper
Sr 2023 m to old books s aengy na sb keh rhyn new s bh aegi plz bta dyn
You must follow old books not believe on other's comments
Sir redioactivity mn mass number change nhi hota na chahe wo koi bhi rays hon? Ya sirf beta k liye h ye?
Okay let me explain:
1. Agr beta decay hoga tou mass number change nhi hota because beta decay main neutron transfer hota hai proton main ya proton neutron main.. Isliye total number of neutrons+proton same rehta hai tou no change in mass.
2. Alpha decay main mass number decrease hota hai by 4 aur atomic number decrease hota hai by 2.
3. Jab neutron decay hota hai tou mass number decrease hota hai by 1 but atomic number same rehta hai.
@@learnixacademy thank you soo much sir awesome explaination
Sir agr 23 me resistance keh raha hen ke stretch hogy to hum yaha R=n^2R
=(2)2R
=4R hoga na
Hume ya parhya ha agr strach hogy wire to waha hm es formula se karengy
Let me explain:
Jo aap keh rahi aesa isliye hota hai kyunki Resistance length k directly proportional hai aur wire k area k inversely proportional hai i.e R ∝ L and R ∝ 1/A
Jab wire ko stretch karenge aur uski length increase (double) hogi aur area half hojayega kam hogi. Agr is tarah karenge tou new resistance 4R hojayegi
Lekin us sawal main sirf context yeh hai k length increase ki hai with the assumption of same thickness isliye humne yeh consider nhi kiya k area main bhi change ayega
@@learnixacademy then Sahi ha sir thank u
sir please reply please reply apne isme ye optical wala chapter hai solve kya hua hai leikn ye mdcat ai tou nyi ayega na??
is saal ke mdcat mai*
reply krein please
You're right. Optics wala chapter chor dain wo syllabus main nhi hai.
@@learnixacademy ok sir thankyou!
Sir test SE phly Baki NTS k past papers or chapterwise mcqs b solve kra den
I will inshaAllah.
Sir 23 mn R hoga resistivity jese k Apne kaha length pe depend nhi krti to R hi hoga
Humne yeh assume kiya tha k wahan resistivity ki jaga resistance hoga isliye answer 2R.
@@learnixacademy sahi sir
2015 ka past paper krain sir
Sir apka study grp h to link share kren sir
I have not made a study group yet. Should I make one?
@@learnixacademy yes sir why not ..ap bnaen sir
❤❤❤❤❤
please sary papers dal dain jaldi please please
I will upload more soon!