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

Due to continuous variation only minority charge carriers croses the junction therefore current flows due to minority charges hence zener diode work in reverse biased

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ANSWER

Which communication channel is used in landline telephone and cell phone

Posted by Saima Jain 6 years, 9 months ago

CBSE > Class 12 > Physics

2 answers

Yashika Moudgil 6 years, 9 months ago

Telephone and cell phone both have point to point communication as in both of these the message is shared from one point to another

1Thank You

Alisha Saini 6 years, 9 months ago

In landline ground and in cell phone sky

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Why is it necessary that the electric field lines from a point charge placed in the vicinity of a conductor must be normal to the conductor at every point

Posted by Snehashish Datta 6 years, 9 months ago

CBSE > Class 12 > Physics

3 answers

Snehashish Datta 6 years, 9 months ago

Thanks a lot Nidhi..

0Thank You

Nidhi Chauhan 6 years, 9 months ago

If electric field lines are ll to earth it will lead to surface current so to avoid that flow of charge these are normal to surface

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Raghav Ojha 6 years, 9 months ago

Because if lines are curved then they intersect with each other and then we have two directions of electric field which is not possible

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Chapterwise weightage?

Posted by Nithin N S 6 years, 9 months ago

CBSE > Class 12 > Physics

1 answers

Nitika Neb 6 years, 9 months ago

Check syllabus in this app

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a proton and electric travelling along parallel par enter a region of uniform magnetic field acting perpendicular to their path which of them will move in circular path with higher frequency

Posted by Shiva Singh 6 years, 9 months ago

CBSE > Class 12 > Physics

1 answers

Aayushi Srivastava 6 years, 9 months ago

electron ... since frequency is inversely proportional to the mass..

2Thank You

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Is Doppler effect included in wave optics class 12 physics CBSE ?

Posted by Gagan Singh 6 years, 9 months ago

CBSE > Class 12 > Physics

3 answers

Yashika Moudgil 6 years, 9 months ago

1Thank You

Deepak Jindal 6 years, 9 months ago

1Thank You

Pragya Gupta 6 years, 9 months ago

1Thank You

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Is experimental study of photoelectric effect included in physics2019. Class 12 CBSE syllabus ?

Posted by Gagan Singh 6 years, 9 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

blueprint of cbse class 12 2018-19

Posted by Shruti Jain 6 years, 9 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Did anyone have communication chapter's noted plzzz I really need it....

Posted by Shriya Gautam 6 years, 9 months ago

CBSE > Class 12 > Physics

2 answers

Shriya Gautam 6 years, 9 months ago

Can u please give me through email

0Thank You

Nitika Neb 6 years, 9 months ago

Yes

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ANSWER

Does ques are repeated from 10 years...ques paper

Posted by Aryaman Singh Tomar 6 years, 9 months ago

CBSE > Class 12 > Physics

2 answers

Vinay Singh 6 years, 9 months ago

Some of them are repeated

1Thank You

Gudiya Yadav 6 years, 9 months ago

May be but not eject theory of the can be change....

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Need help in Physics notes of chapters. Wave Optics and transistors and Electrostats. Those who can send it via email/ WhatsApp. Please reply. It's really urgent.

Posted by Utsav Aryan 6 years, 9 months ago

CBSE > Class 12 > Physics

2 answers

Sanskriti S 6 years, 9 months ago

Yeah, u can get notes of aman dhat. of any subject - they 're the best notes for board.!!

1Thank You

Shivam Bhati 6 years, 9 months ago

Aman dhattarwal notes on you tube

2Thank You

ANSWER

Need help in Physics. Can anyone help me?

Posted by Utsav Aryan 6 years, 9 months ago

CBSE > Class 12 > Physics

5 answers

Yashika Moudgil 6 years, 9 months ago

Guys see notes of aman dhattarwal from youtubes He gives notes of every subject of PCM Best for boards I also prefer them.....

0Thank You

Utsav Aryan 6 years, 9 months ago

Can you send me the pics of the notes on my email/insta/WhatsApp?? Wherever you feel safe. It's really urgent.

0Thank You

Sanskriti S 6 years, 9 months ago

yeah

2Thank You

Utsav Aryan 6 years, 9 months ago

Are you having notes of Wave Optics and transistors and electrostats?

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Sanskriti S 6 years, 9 months ago

sure

2Thank You

ANSWER

Can two identical source be Coherent .

Posted by Vipul Rajvanshi 6 years, 9 months ago

CBSE > Class 12 > Physics

1 answers

Mohd Zibrael 6 years, 9 months ago

Yes

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ANSWER

Explain "Charge can be quantilised

Posted by Devyani Malvi 6 years, 9 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Need help in Physics notes.. so anyone having it please help me

Posted by Utsav Aryan 6 years, 9 months ago

CBSE > Class 12 > Physics

3 answers

Yogesh Kumar 6 years, 9 months ago

For that, u go on the original site of vedantu, where u have to enter your email, then click on the chapters u want, it will give u link in your mail where u click on download, it will be stored in your mobile ?

2Thank You

Utsav Aryan 6 years, 9 months ago

Wave Optics,Transistor and Electrostats

0Thank You

Shashi Nath Jha 6 years, 9 months ago

Kon se chap k notes ??

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ANSWER

Hw we prepare for the physics in the 2 days?

Posted by Alka Kaushik 6 years, 9 months ago

CBSE > Class 12 > Physics

2 answers

Utsav Aryan 6 years, 9 months ago

And first take the today's paper and forget the rest.

2Thank You

Utsav Aryan 6 years, 9 months ago

Study from sample paper/ question bank.

1Thank You

ANSWER

What is the definition of redbergs constant

Posted by Poonam Kumari 6 years, 9 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

please Koi bt skta hai ki physic me derivation Kese aata hai

Posted by Sachin Kumar Yadav 6 years, 9 months ago

CBSE > Class 12 > Physics

1 answers

Sanskriti S 6 years, 9 months ago

check previous year que papers

1Thank You

ANSWER

what is coulumb law

Posted by Sandeep Sandeep 6 years, 9 months ago

CBSE > Class 12 > Physics

1 answers

Ramakrishna Motukuri 6 years, 9 months ago

Coulomb's inverse square law : force between two point charges is directly proportional to product of charges and inversely proportional to square of distance between the charges . proportionality constant k = 1/4Π epsilon =9*10^9

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Mirror farmula

Posted by Srinivasan Thangam 6 years, 9 months ago

CBSE > Class 12 > Physics

2 answers

....... ........ 6 years, 9 months ago

1/f=1/u+1/v

0Thank You

Harsha Phansalkar 6 years, 9 months ago

Formula hota hai bhai

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Four equal charges each having magnitude +q is placed at 4 corners at square having each side l. Find net force acting at +q placed at one corner.

Posted by Cutiepie Tanu 6 years, 9 months ago

CBSE > Class 12 > Physics

1 answers

Ramakrishna Motukuri 6 years, 9 months ago

Force due to adjacent charges is equal and is equal to kq^2/a^2 (a= side of square) resultant force =√(f^2 +f^2 + 2f^2cos90°) which is equal to √2F ,i.e √2kq^2/a^2

1Thank You

ANSWER

How to prepare physics in 2 days. From where to start. What is most important??

Posted by Chahat Chopra 6 years, 9 months ago

CBSE > Class 12 > Physics

1 answers

Pooja Bhatia 6 years, 9 months ago

I think you should start from the easiest section as it would increase your confidence . Complete your Modern physics tomorrow including semiconductors and communication system

3Thank You

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Important derivativations??

Posted by Ankita Yadu 6 years, 9 months ago

CBSE > Class 12 > Physics