CBSE > Class 12 > Physics | CBSE Board | Homework Help

Outside Delhi is rather more important....it consist whole India questions separately...but notable is that if you are outsid of Delhi then you have to choose outside Delhi...else choose delhi

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Elina M 7 years, 10 months ago

hm thnkz

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Importance depends on year....2014 delhi question was very good of maths.....2015 out of delhi questions were good.....so do as many as u can

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Elina M 7 years, 10 months ago

n what is outside delhi questnz??????

1Thank You

Tarang Banjare? 7 years, 10 months ago

I think delhi one is more imp.

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Elina M 7 years, 10 months ago

plZz tell any1...!!!!

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ANSWER

What do 3 wires in step down transformer represent?write uses also

Posted by Salman Naqvi 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Ground state energy of hydrogen atom is -13.6ev. What are the kinetic and potential energies of electronic in the 1 st exited state.

Posted by Vipin Singh 7 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Vijay Bhatt 7 years, 10 months ago

And soon

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Vijay Bhatt 7 years, 10 months ago

-3.4 -1.51 -0.85

1Thank You

ANSWER

Electric field due to dipole at equtorial position

Posted by Awash Tamrakar 7 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Elina M 7 years, 10 months ago

2qaP/4^Er3

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Jin Kazama 7 years, 10 months ago

pk/x^3

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ANSWER

What is velocity filter

Posted by Peter Parker 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Sajal Joshi 7 years, 10 months ago

Condition of qE =qVB .V=E/B

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ANSWER

Solar cell from chapter semiconductor class 12

Posted by Jyoti Gupts 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

State the concept of mobile telephony and explain its working?

Posted by Vibhanshu Tripathi 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why is germanium preferred over silicon for making semi conductor devices

Posted by Ritu Kumark 7 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Jin Kazama 7 years, 10 months ago

good answer

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Germanium has less ionisation enthalpy....due to larger size....so electrons can easily move....

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Jin Kazama 7 years, 10 months ago

At room temperature , silicon crystal have fewer electron than Germanium crystal , however Silicon crystals are not easily damaged by excess heat . silicon is less expensive due to the greater abundance of element so silicon is preferred over germanium

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ANSWER

Fast

Posted by Shivam Panwar 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 7 years, 10 months ago

तेज

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ANSWER

Sample paper ke answer

Posted by Shivam Panwar 7 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Jin Kazama 7 years, 10 months ago

melody kaho or khud Jan jao

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Answer hai 234²

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Hitesh Kumar 7 years, 10 months ago

Which sample paper ???? ???

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ANSWER

Is any work done on a moving charge by a magnetic field

Posted by Unique Person Arupitw 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Ritu Gupta 7 years, 10 months ago

no, because magnetic force has no component in the direction of displacement of charge

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ANSWER

Cbse 2017 outside delhi set 2 ques 10 and 11

Posted by Sajal Joshi 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

If its asked what is debrogli hypothesis ....how to write perfectly need perfect and easy answer

Posted by Saiyed Faraz 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Saiyed Faraz 7 years, 9 months ago

Your a**

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ANSWER

Energy stored in parallel capacitors

Posted by Niyati Singh 7 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Jin Kazama 7 years, 10 months ago

U = QV/2 = Q^2/2C = CV^2/2

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Abhay Shrivastava 7 years, 10 months ago

1/2CV^2

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ANSWER

What is the use of malus law?

Posted by Akash Rathod 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is a potential difference

Posted by Sono Yangfu 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Jin Kazama 7 years, 10 months ago

it is diff. of potential b/w two ends of a battery

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ANSWER

Can two identical bulb of Same power act as a coherent source of light ? Explain

Posted by Sparsh Anand 7 years, 10 months ago

CBSE > Class 12 > Physics

9 answers

Preeti Kranti 7 years, 10 months ago

No because they don't maintain a constant phase difference

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Sparsh Anand 7 years, 10 months ago

Can anyone tell why not

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

From net

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Why do two identical bulbs do not produce interference? Still have a question? Ask your own! What is your question? Ad by Careers360 JEE Main preparation tips from experts. Download the ebook and know tips and tricks to crack JEE Main 2018. Download 4 ANSWERS Eli Pasternak Eli Pasternak, MsEE BsEE, 28 patents, EM fields, comm theory, quantum mechanics, relativity Answered May 1, 2017 · Author has 1.8k answers and 795.5k answer views Lightbulbs, including modern LED types, produce light that is called “non-coherent”. This means that each photon of light has a frequency and phase that is randomly related to other photons from the same lightbulb or from the other one. When two such light sources shine on a surface each pair of photons, one regardless of which lightbulb they came from, do produce an interference pattern even if their frequencies and phases are random, however when we see is a the sum of trillions of such interference patterns, each different from the other and each constantly changing with the emissions of new photons, we get an even-looking smooth surface of light. Only two identical lasers which are highly frequency-stabilized will produce a visible interference pattern on surfaces where their projected lights overlap.

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Aditya Raj 7 years, 10 months ago

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Vijay Bhatt 7 years, 10 months ago

But why

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Never

2Thank You

Vijay Bhatt 7 years, 10 months ago

If they have same frequency

1Thank You

Muskan Chauhan 7 years, 10 months ago

no because they have different freq.

3Thank You

ANSWER

Magnetic field due to current carrying circular loop at some distance from the center on axis

Posted by Rishabh Jain 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Sparsh Anand 7 years, 10 months ago

biot savart law

3Thank You

ANSWER

Write the important properties of photons which are used to establish Einstein photo electric equation

Posted by Mamun Rashid 7 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

The energy of the electrons does NOT depend on the intensity of the light. Each electron absorbs only one photon at a time. If the absorbed energy is large enough to expel the electron from the metal, it leaves. If not, the electron dissipates its energy in collisions with nearby electrons and atoms before it can absorb another photon. And yes, this implies that the time it takes for an electron to lose the energy gained in one absorption is much smaller than the interval between absorptions. Under ordinary circumstances, it is. The electrons always appear AS SOON AS the light reaches the plate (though a feeble light produces only a few). As soon as a single photon containing sufficient energy strikes the source plate, it will knock an electron free. There is no need to wait for multiple waves to build up enough energy. NO electrons are produced if the frequency of the light waves is below a critical value. Since the energy of each photon is e=hv below some critical frequency, no photon has enough energy to knock an electron free.

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Sparsh Anand 7 years, 10 months ago

Travel with speed of light Electrically neutral Zero rest mass

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ANSWER

Solar cell is forward biased or reversed biased & why?????

Posted by Hina Siddiqui 7 years, 10 months ago

CBSE > Class 12 > Physics

5 answers

Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

No biasing....

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Vijay Bhatt 7 years, 10 months ago

Pn junction is only a junction of two semi conductor It is not necessary that it should be biased Solar cell work on the radiation No battery is connected so how it is biased?

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Hina Siddiqui 7 years, 10 months ago

Pr bina biased ke pn junction kaise ho skta h

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Atul Sharma 7 years, 10 months ago

It is not forward or reverse biased .. but from that we take our output

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Hina Siddiqui 7 years, 10 months ago

Any 1.here Plse give me ans

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ANSWER

Cbse sample paper solved 2018

Posted by Aditya Srivastava 7 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Sparsh Anand 7 years, 10 months ago

Surf cbse.nic.in Download marking schem

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Hitesh Kumar 7 years, 10 months ago

Toh kya hua???

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ANSWER

What type of impurity is added to obtain n-tyoe semiconductor

Posted by Divya Sen 7 years, 10 months ago

CBSE > Class 12 > Physics

86 answers

Drishtee Gupta 7 years, 10 months ago

Kuch log past me he rhe h .. Divya I m correct naa ..

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Drishtee Gupta 7 years, 10 months ago

Bhai. Ek ladki aur ek ladka friend kyu nhi ho sakte. . mere bhi bhaut sare ladke friend h .. Iska mtlab ye to nhi vo sare mere bf hue ..

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Divya Sen 7 years, 10 months ago

Haan toh kya ek girl or boy frnd ni ho skte kya JB ksm se aisa bol k tu aaj k jamaane me bhi kitta narrow minded h ye show kr rha h..tere frnds ni h kya

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Divya Sen 7 years, 10 months ago

Mai khud apne is chidchide aur gusse ki aadat se pareshan hu..khush rhne ki koshish krti hu toh sau log aajate h dimag khane waise hi abhi abhi thoda thik horhi thi mai meri life me pr fir...sch btau toh mujhe terese baat krne k baad achha lga vineet koi toh dhng ka lga insan isiliye baat ki wrna mai kisi k muh ni lgti faltu me pr log glt smjhte h haan achha lgta h yr baat krna i like u as a person tu hi bta ab kya maine kai baar ni bola ye baat tujhe?

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Friends -ek girl hai aur ek boy

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Drishtee Gupta 7 years, 10 months ago

Hey ! We all know that divya and vineet are just good friend .. To dosti me mzak chalta h .. Pta nhi log kyo Divya aur vineet ko gàlat samajh raheh ..

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Impurity wale question ka answer tha ye

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Divya Sen 7 years, 10 months ago

Dekh JB bta chuki hu tujhe mai phle hi ki mujhe kisi bhi baat pe bahut gussa aata h khas kr apne se related chahe kbhi kbhi koi mjak me hi q na bole pta ni q itta gussa ata h mujhe short tempered hu mai bahut jada tujhe bolne k baad b whi kr rha tha tu mujhe baat hi ni krni tujhse

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

God.....isme to sab gandgi hai....

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Vineet Kumar Gupta 7 years, 10 months ago

yaar mitti dal divya saanth ho jaa . tere toh nahi pata pare terr ko mei bahut like karata hu .tu maat ja tu flirt kar nafrat kar jo bhi kar mujei koi problem nahi hai . tere sei baat karna acha lagta hai isselye karta hu . tu offend na hua kar achi nahi lagti tu sad. tu bol toh sahi tujhey kya passand hai kya nahi . tere aakon mei asson aur moh pei udaasi kuch nahi aanei dunga . Tu baas sant raha kaar . aur gussa mat huua kar. yaar

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Divya Sen 7 years, 10 months ago

Arey achha lga insan toh baat kr rhi ti yaar vineet se frnd ki trh msti kr ri thi mujhe kya pta tha sbko itti khujli hojayegi yaar sorry vineet tujhe b agr mai ni thik lgti toh tu abhi bta turant bs ek baar bol chli jaungi yha se sb glt smjh rhe h mai kisi ko psnd kru ya nfrt unko kya

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Vineet bhai tu pehle chat pad kuch nhi bola uske bare me bura ..... aur 'baap ka app nahi hai' isme me kaha usko ya uske family ko kuch bol ra hu ....sach hi to hai...... Faaltu mai khud offend ho jate hai yaha loog saare...

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Vineet Kumar Gupta 7 years, 10 months ago

JB bhai hai yaar tu toh maat kar issei . Bhai usei iss language mei baat . ladki hai ooh or ussei phele teri friend bhi aur ek acha insaan bhi hai . bhai isseiliye divya ko thodi izzat dei dei . uskei jagah apnei aap ko rakh phir pata chalega kaisa lagta hai. ek ladki ke kiye uskei izzat or character bahut imp hota hai issei mat karab kar intentionally yaa unintentionally . Tujsei ladai karna nahi hai mujei kaffi acha dost samjta hu tujei . uski nahi toh meri baat hi maan le please

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Divya Sen 7 years, 10 months ago

Mai ye sb pyaar wyaar k lfde me nai hu na rhna h aur mai kisi se pyaar kru ya nfrt tujhe kya h J B...aur chat k beech me kisi k bolne se mai gussa ni hoti tu likha kya h ye to dekh phle aisa bkws likhega to mai kya khus hou ya gali du bta..aur kitte baar boli hu ki mere ya mere pariwar k baare me ulta sidha ni sunna psnd mujhe phle phle aake ungli mt kiya kr tu bs yha bkr krna h jb dekho ashleel aur neech logo k jaise baate kr h mahol me gndgi failana h bs aur wo b itta mna krne k baad bhi

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Vineet Kumar Gupta 7 years, 10 months ago

sweety sorry if you felt like this. I was not taking rudely i thought we had a good relation of friendship and as much as i know you are calm and composite so i was not expecting that emotional outburst. I am very sorry of you felt i was talking rudely . tunei bhai bola hai mujei toh . thoda hakh hai na majak karnei ka mera iss lihaj sei hai ki nahi ? dont get offended and tu aaja kabhi bhi kisi chat mei tereko koi nahi kuch bolega pakka .

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Dono kadimaag satak gaya pyaar me... Bas bina karan gussa ho re hai agar inke chat ke beech me koi kuch likh de to...

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Divya Sen 7 years, 10 months ago

Aisa kuch ni h sweety mujhe b vineet achha insan lga h isliye usse baat krna achha lgta h glt na smjh

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Bhayya bhabi ki chatting app nahi hai ye...mene question ka answer diya hai

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Aisha Grewal 7 years, 10 months ago

Vineet muje mra Kam krn k liye tri permission lne ki zrurt nai h....2)bhai mra tuje hurt krne ka koi intention nai h or na hi tha kbi... In any way.... 3)u r talking with me rudely.... If I'm talking with you calmly and patiently then u should also, these are called as manners... 4)if u r hurted, then u can talk to me directly not to be behave like this... 4)don't think that I'm trying to coming in between u and divya..... I CONSIDER BOTH OF U AS MY GOOD FRIENDS...... BUT NO I'M WRONG...... so sorry guys 4 everything.......... I'm wishing both of you... Not kidding ?????????

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Divya Sen 7 years, 10 months ago

Mai chli jau kya yha se bahut preshani h sbko aur level ni girana mujhe apna

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Divya Sen 7 years, 10 months ago

Aur mai kisi ki bhabhi ni hu smjha

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Divya Sen 7 years, 10 months ago

Arey kaminey mujhe maaloom h kisi k baap ka app ni h toh tere bhi baap ka ni h aur tu mere family pr naa jaa mujhe psnd ni h..aur mai tereko kb bol ri hu kuch tu khud beech me ghusta h sbke chats pe jbrdsti mt uksa mujhe tu mujhe koi mtlb ni terese

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Vineet bhayya divya bhabi ko samjhao ki ye app unke baap ka nahi hai ...... Koi bhi kahi bhi answer daal sakta hai... To door rehne waali baat na hi kare...

1Thank You

Divya Sen 7 years, 10 months ago

Abey tu hai kon jise mai puchungi valentine k liye haan?? Phle bhi tu mujhse jbrdsti uljha tha ab bhi mt kr bta ri hu bahut gussa arha h mujhe..and now bhaad me jao jisko jo sochna h mere baare me socho mujhe koi mtlb ni ab bass..

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Vineet Kumar Gupta 7 years, 10 months ago

JB tafri na kaat usei . Bahut gussa aata hai mujey jab usei koi gussa karta hai . Aur divya tere ko gali dene ki koi zarurat nahi hai mei hu uskei liye keep calm and chill

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Vineet Kumar Gupta 7 years, 10 months ago

Social networking par na tu par yeh sun . you dont need a email id to send a email or recieve a email. or if you want to share pics or any file to anyone without risking your privacy you can use this thing. *mere pass toh kudh ki website hai aab to oohi upload kar deta hu nahi toh yeh use karta tha. open chrome and type "www.fileconvoy.com" its a free file sharing platform like many and its secure .And it has a option that deletes your file after certain time . UPLOAD YOUR FILE. then click reviece email notification and enter email of whom you want to send file or directly share the link . kyuki this public forum i would suggest not to share the link . So you could enter this email in all the fields "[email protected]" and click upload (please also click agree buton there ) your file will be sended to required person without any trace of your involvement and personal data ☺?

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Are mujhe laga valentine's Day aane wala hai to mujse pucha hoga...

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Divya Sen 7 years, 10 months ago

Bda aaya itta bkwas likh k "nhi" ho bol rha h..dekh J B tereko kitte baar smjhaya h maine mt lg tu mere se tere kaaran galiya dene pd ja rhe h jo ki ni chati mai toh door rh tu..naam change kr k uchal mt jada

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Divya Sen 7 years, 10 months ago

Saale itta ghuma fira k q bol rha h..waise b tere se ni puch ri hu smjha

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Tum to sadi hui , gandi , machchar , gobar , fate pure kapdo ke saman , ya fir dustbin (koode wale ke aane se pahle ki) , ' nahi ' lagti

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Divya Sen 7 years, 10 months ago

Achha mai jo hu wo sahi hu aisa kya..thnx..waise jokes apart sch bta mai kaisi lgti hu tujhe

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Divya Sen 7 years, 10 months ago

Meri pic chiye toh fir wait kr le ok abhi toh ni 12th k dad jb personal cellphone ajayegi tb social networkings me aa jaungi

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Divya Sen 7 years, 10 months ago

Ham toh bhai shivratri hi mnayenge phle se hi soche the aur parents day bhi h usdin..

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Vineet Kumar Gupta 7 years, 10 months ago

valentines day toh faltu hai bacho kei liya hai ooh sab meri wali jo hogi oh toh shivratri manayegi direct. ???

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Vineet Kumar Gupta 7 years, 10 months ago

Beauty lies in eyes of the beholder .fark nahi padha hai tu beautiful hai ya nahi . jo hai sahi hai tu. aur pic toh teri manguga na ..par man karei toh de dena .. ??

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Divya Sen 7 years, 10 months ago

Ole le handsome man boli toh thi it was ?...waise i m also damn beautiful?

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Vineet Kumar Gupta 7 years, 10 months ago

Mei hu ho ittna handsome ??

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Divya Sen 7 years, 10 months ago

Are tum log ye kya valentines day bkwas krte ho yaar kya krte ho tumlog aisa usdin bs fltu k chochle?

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Divya Sen 7 years, 10 months ago

Haan haan dar gyi bahut jada?

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Vineet Kumar Gupta 7 years, 10 months ago

arey sweety teri sei poocg kaun rahi hai ??? kaam kar tu apna

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Aisha Grewal 7 years, 10 months ago

Mne bhot phle tri photo vekh li thi bhai....... Bt I don't want to say

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Vineet Kumar Gupta 7 years, 10 months ago

dari toh nahi dekh kar ???

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Divya Sen 7 years, 10 months ago

N i saw your pic?

0Thank You

Divya Sen 7 years, 10 months ago

Haan vineet i swear mujhe first prize mila handwriting k liye?

1Thank You

Vineet Kumar Gupta 7 years, 10 months ago

chalo jise like karti ho ussei ke saath mana lena kucsh

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Vineet Kumar Gupta 7 years, 10 months ago

agar kabhi kisi ko mei abhi kaisa dikta hu janna hai toh mere website ka naam type kar /vineet.jpg lagaey aur aakarshak parinam paaye ???

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Aisha Grewal 7 years, 10 months ago

Bs Yr or scroll nai kr skta m.... Upr

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Aisha Grewal 7 years, 10 months ago

Amit..... ???itta vdda joke....... Or vo mre place s nai h........ I like someone else

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Vineet Kumar Gupta 7 years, 10 months ago

Aur rahi baat valentines day ki toh Humari chodo aur tum Celebrate kar lo kisi ke saath ...Oh Amit hai na ???tumharei gaao ka bhi hai ??

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Vineet Kumar Gupta 7 years, 10 months ago

kon sa writing. acha ooh jo meine c++ mei likha tha aur apni website pei upload kiya tha ??? arey haha mere handwriting thodi sei "Kam acha hai " par ooh jaldibaji mei likha tha. Sach batao tumhari handwriting itni achi hai kya ? WOW .. hahhaa

1Thank You

Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Aaj thodi hai

1Thank You

Aisha Grewal 7 years, 10 months ago

Congratulations..... Happy valentines day

1Thank You

Divya Sen 7 years, 10 months ago

Everything is nice bas writing thoda...? but chlta hai...waise mujhe writing k liye 1st prize mila tha?

0Thank You

Divya Sen 7 years, 10 months ago

Tumhare life k baare me kuch kuch baate thi wo b dekha maine ek solution b kiya tha tumne toh writing b dekh li maine toh?

1Thank You

Divya Sen 7 years, 10 months ago

Haan ji aap bhi nice hain..baato se bhi...ab tk k mere sth apke behaviour me bhi...aur pics toh website me kuch dekhe h maine usme bhi?

0Thank You

Vineet Kumar Gupta 7 years, 10 months ago

Nice bas shayari hi nahi Hum bhi hai ? aur gaur sei dekho toh sahi

1Thank You

Divya Sen 7 years, 10 months ago

Nice shyris...but wrong place still!!

1Thank You

Vineet Kumar Gupta 7 years, 10 months ago

Hyderabad ??

0Thank You

Vineet Kumar Gupta 7 years, 10 months ago

kya karey kalam par haat aacha ahi code aur shayari dono acha likh leta hu :)

0Thank You

Vineet Kumar Gupta 7 years, 10 months ago

ye sayari sayad apko apka jaabab dei dei likha hai ye bhi apkei hi naam

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Vineet Kumar Gupta 7 years, 10 months ago

Agar isk bas tere jism sei hota , Toh kab ka chod chukey hotey tujhey, par kya karey teri roh sei rista acha hai humhara by :- Vineet kumar gupta

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Divya Sen 7 years, 10 months ago

Aacha aap hmari adaao k deewane hogye bin dekhe hi hme?? Waise achhe logo ko looks ni insan ka dil achha ho ye dekhte h jinme se aap bhi hain achhe insaano me se thnx..waise dikhti bhi achhi hu

1Thank You

Vineet Kumar Gupta 7 years, 10 months ago

Arey aap gali bhi de deti toh bura nahi lagata . ??? vinnu sei kaha lag jayega .. bura nahi direct dil pei laga .bio walei ho aap toh pata hi hoga

0Thank You

Divya Sen 7 years, 10 months ago

Vinnu bol ri thi toh bura lga kya agr lga toh sorry

0Thank You

Vineet Kumar Gupta 7 years, 10 months ago

aab likhey thi toh apkei liye hi thei

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Divya Sen 7 years, 10 months ago

Kahi ni jarhi hu msti tha bass..kis k liye thi shayri haan?

0Thank You

Vineet Kumar Gupta 7 years, 10 months ago

yeh toh nahi poocha ga ki kaha ja rahi kyuki mujey pata hai tum batanei sei rahi . ok bye

1Thank You

Divya Sen 7 years, 10 months ago

Arey arey baba bura q maan gye ji vinnu sorry msti kr ri thi pta h yaar koi ni h tumhari...aur mera toh aur ni achha bura lga sry bye jaa ri hu yaar ab ok sry.

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Vineet Kumar Gupta 7 years, 10 months ago

Yu na zulf lahraya kar tu , Yu na rukh kar holey holey sabdoo ko chasnei nei udeel kar tapkaya kar tu , Tere dewanei phele sei hi hai hum , Yu na apnei adao sei aur dewana banaya kar tu by :- Vineet kumar gupta

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Divya Sen 7 years, 10 months ago

Vinnu tumhari koi gf vf toh ni h na dekho kahi usey pata chl gya ki mujhse baat krte ho msti me toh bura naa maan jaaye?????

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Vineet Kumar Gupta 7 years, 10 months ago

yehi sun kar acha laga ka "KISI" ka din aur bio practical acha gaya . Badei hi azzeb hi dil hai humharey dusro ki kushi mei kush ho jatey hai

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Divya Sen 7 years, 10 months ago

Bolo na kya sun k achha lga tumhe...

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Divya Sen 7 years, 10 months ago

Haan pata hai mujhe ki tumhe nhi aati java maine dusro se poocha tha jisko aata ho kisi ko ni aata...

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Vineet Kumar Gupta 7 years, 10 months ago

java aati nahi ?

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Divya Sen 7 years, 10 months ago

Kal poocha tha maine palindrome string ka java code kisi ne ni btaya waise hai mere paas but desired output nhi aarha

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Divya Sen 7 years, 10 months ago

Kya sun kr achha lga tumhe

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Divya Sen 7 years, 10 months ago

Arey ek aur hai ip ka bcha h abhi bhi 15 ko hai..

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Vineet Kumar Gupta 7 years, 10 months ago

Sun kar acha laga .

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Divya Sen 7 years, 10 months ago

Achha tha practical... ni ni mujhe ni aata tha ans

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Vineet Kumar Gupta 7 years, 10 months ago

dekha maine :) . How was your bio practical . tumei yeh answer pata tha na

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Divya Sen 7 years, 10 months ago

I gave the answers of those which u asked yesterday...

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Divya Sen 7 years, 10 months ago

Thnx vineet?

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Vineet Kumar Gupta 7 years, 10 months ago

for achieving a semiconductor of. n type we add a dopant which which has more electrons than the base material of semiconductor hence for 14 group elements we add 15 group elements and for 13 group we add 14 group elements

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Divya Sen 7 years, 10 months ago

Thnx

1Thank You

Hitesh Kumar 7 years, 10 months ago

Pentavalent

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Divya Sen 7 years, 10 months ago

*type

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ANSWER

Trace the path of a ray of light passing through a glass prism ABC .if the refractive index of the glass is 3 find the value of angle of emergence from the prism.

Posted by Nikita Tyagi 7 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

why wavelength of light decreases in water while speed also decrease

Posted by Amarvir Amarvir 7 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Varun Banda 7 years, 10 months ago

Light changes wavelength as it passes from one medium to another because it changes speed as it enters the new medium. Light's energy is defined as its frequency multiplied by the Planck constant ( E = h f ). When light travels from one medium to another, its energy doesn't change, so its frequency stays the same, this is observed as light not changing color as it passes through glass. However, its speed does change (kind of). From the formula v = f λ , the velocity changes so the wavelength changes. As light travels from a less dense medium to a more dense medium (like from air to glass), its velocity decreases, so the wavelength increases. It is this change that causes light to bend. This is determined from the materials refractive index, using the formula v 2 v 1 = n 1 n 2 . Now the speed of light doesn't actually change, because the speed of light is a fundamental constant. However, it does take longer to pass through a medium with a higher refractive index. For this explanation, we can think of light as a particle. Refractive index is determined by a material's density. When light passes through a material of high density (glass for instance), it collides with and is scattered from the glass molecules. So the light doesn't actually take a straight path through the material, it bumps from molecule to molecule. In a dense material, there are more particles in a smaller volume so it gets bumped around more, and ends up taking a longer distance to the other end of the medium as compared to a less dense material. But the speed of the light from molecule to molecule is always c, but we like to simplify it to say that it travels in the shortest distance, but at a different speed.

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ANSWER

The value of cos60

Posted by Matiyam Khatoon 7 years, 10 months ago

CBSE > Class 12 > Physics