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What is a p-n junction

Posted by Aman Saxena 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

N Aaditya 6 years, 10 months ago

Crystal of si or Ge having one end of p type and other end of n type semiconductor

1Thank You

ANSWER

What is volume charge distribution

Posted by Akshat Mishra 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Deepak Gupta 6 years, 10 months ago

q/V

0Thank You

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What is velocity selector?

Posted by Tannu Pandey 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Anuj Sharma 6 years, 10 months ago

V=E/B is formulae for velocity selector. it is a system which is used for selection of those particles moving with velocity V by passing it through mutual perpendicular magnetic and electric field

2Thank You

ANSWER

What is the verification of gauss law

Posted by Shriram Nema 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Answers of sample papers

Posted by Sangeet Lamba 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Neeraj Rawat 6 years, 10 months ago

scroll down the page then u will got answers

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Why magnetic field doesn't form closed loop

Posted by Abhishek Pathak 6 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Sayantani Chattopadhyay 6 years, 10 months ago

Magnetic field forms closed loops. Electric field does not, in case you mixed up.

0Thank You

Aditi Bhat 6 years, 10 months ago

Magnetic field forms closed loop

0Thank You

Meenakshi Sangwan 6 years, 10 months ago

Bcz there are no magnetic charges i.e monopoles

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ANSWER

Use gauss law to derive the expression for the electric field due to a straight uniformly charge infinite line of charge

Posted by Shivani Dobal 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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Practical of Ray and optics section

Posted by Ishan Shrivastava 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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What is meaning of charge

Posted by Akash Prasad 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Prachi Arora 6 years, 10 months ago

It is an intrinsic property of particles due to which cureent can be produced

2Thank You

ANSWER

What is the rest energy of a photon?. Is it zero!

Posted by Murugesan Palani 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Pragya Gupta 6 years, 10 months ago

E=hv

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Working of hydro power plant breeifly

Posted by Sonia Paruthi 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

A potentiometer wire ab. Of length 1m connected to a driver cell emf 3v when a emf of 1.5v used in the secondary ckt the blanc point found 60 cm on replacing blanc shift 80 cm cal unknown emf

Posted by Manoj Kumar 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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Theory based on concave mirror

Posted by Jince Jinu 6 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Somil Dubey 6 years, 10 months ago

It is converging in nature

1Thank You

Raunak Himmatramka 6 years, 10 months ago

It is diverging in nature

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In optics, is it necessary " derivation of lens maker's formula from AB- initio" from board exam point of view??

Posted by Mayank K. Mahour 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Tannu Rani 6 years, 10 months ago

Yes it is very important

1Thank You

ANSWER

What is equipotential surfaces

Posted by Mansi Sharma 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Sumant Pandey 6 years, 10 months ago

Those imaginary surface on which potential are same; i.e.potential at all point on that surface are constant

2Thank You

ANSWER

Why magnetic field lines form close loop?

Posted by Ritik Panchal 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Ritik Kushwaha 6 years, 10 months ago

Because monopoles are not exist

1Thank You

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Why does the earth rotates?

Posted by Kumar Verma 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

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Viva questions for physics

Posted by Anuksha V 6 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Rohit Kumar 6 years, 10 months ago

Its depend upon examiner mind . He can ask que. From whole syllabus or project work.

0Thank You

Amarjeet Singh 6 years, 10 months ago

which experiment u want ~??

4Thank You

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State the properties of nuclear forces.write the relation between half life and decay constant of a radioactive nucleus.

Posted by Alisha Saini 6 years, 10 months ago

CBSE > Class 12 > Physics

3 answers

Sayantani Chattopadhyay 6 years, 10 months ago

1. Short ranged, 2. Charge independent, 3. Attractive , 4. Has exchange character and arises due to mason exchange, 5. Spin dependent.

1Thank You

Ritik Kushwaha 6 years, 10 months ago

Nuclear force are short range force. Nuclear force are noncentral force.

0Thank You

Anjana Sherawat 6 years, 10 months ago

Nuclear forces are charge independent and strong up to a short limit

1Thank You

ANSWER

Why current density is a vector quantity?

Posted by Rajeev Kumar 6 years, 10 months ago

CBSE > Class 12 > Physics

2 answers

Ritik Kushwaha 6 years, 10 months ago

J=I/A

0Thank You

Meenakshi Sangwan 6 years, 10 months ago

Bcz its having magnitude equal to current throgh a very small unit area ...the area being normal to the direction of flow of current and direction along the current .

4Thank You

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In a uniform electric field E, the potential difference between two points A and B is 1.0 volt. It is given that AB=4cm and angle is 60° with E . Find the fiels strength E

Posted by Sarmistha Sahoo 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Write the properties of electric lin

Posted by Dawa Tshering 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Pragya Gupta 6 years, 10 months ago

They dont pass on each other 2 they do not form closed loop

1Thank You

ANSWER

Find the focal length of a convex lens using two pin method u-v method

Posted by Vishal Bauri 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Expression for electric field at a point on equatorial line of electric dipole

Posted by Harman Gill 6 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Ayushmaan Jangid 6 years, 10 months ago

Kp÷r^3

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a potential diff of 100v is applied across 1m wire.calculate the average velocity of the electroan compare it with thermal velocity of 27c g

Posted by Dev Tripathi 6 years, 10 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Ncert additional exercise's some questions are very difficult can they come in board exam??

Posted by Rajat Dhull 6 years, 10 months ago

CBSE > Class 12 > Physics

4 answers

Kuldeep ?? 6 years, 10 months ago

Yes in ncert every que is impotant. So which que you think is difficult you read it and then thik about that que that what is written in que and learn it.

1Thank You

Sakshi Singh 6 years, 10 months ago

Take both the advices.?

1Thank You

Rahul Semwal 6 years, 10 months ago

First try last year questions that would help you to build up for ncert.

1Thank You

Sakshi Singh 6 years, 10 months ago

Revise them once or twice but don't cram.

1Thank You

ANSWER

what are some common questions ask in physics board viva class 12