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

It is a wavelength which is manifested in all the particles in quantum mechanics according to wave particles duality and it determine the probability density of find the object at a given point of the configuration space It is inversely proportional to particle momentum. Hope it helps..

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Is it necessary to write signs of magnitude of force in finding electrostatic force

Posted by Shivam Shukla 7 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Ankit Jain 7 years, 11 months ago

Yes due to electrostatic force is a vector quantity

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Sonal Nivsarkar 7 years, 11 months ago

Yes

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Can you please add fine art means painting subject please

Posted by Sahil Kumar 7 years, 11 months ago

CBSE > Class 12 > Physics

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Which type of semiconductor we will get if arsenic is doped germanium

Posted by Aman Saxena 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Sudhanshu Saumya 7 years, 11 months ago

We get n type semiconductor As doping germanium with arsenic will result in presence of extra electrons Ge has four valence electrons whereas As has five valence electrons When germanium is doped with arsenic then all the four electrons of Ge forms covalent bonds with four electons of As so one electron of As is free hence it acts as conducting electrons

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Mention the types of communication media

Posted by Soujanya Sobarad 7 years, 11 months ago

CBSE > Class 12 > Physics

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Give an expression for rays of antenna in terms of height from ground?

Posted by Soujanya Sobarad 7 years, 11 months ago

CBSE > Class 12 > Physics

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How to score ? in physics?

Posted by Gaurav Mishra 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Soujanya Sobarad 7 years, 11 months ago

By practicing the ans & by practicing derivations daily u can score ?

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Prove by Gauss theorem for charge uniform infinite plane sheet

Posted by Gaurav Kinariwale 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Sudhanshu Saumya 7 years, 11 months ago

Assume a cylindrical Gaussian surface passing through the infinite plane sheet. Now apply Gauss law for 2 plane surfaces and a curved surface. U will find that for the curved surface E is 0. For 2 plane surfaces which are on the opposite sides of plane sheet E•A + E•A=βA/ε0 (assume β to be charge density of the plane sheet) Which gives E= β/(2*ε0) With figure it was better to understand

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Help me in topic transistors

Posted by Ruchi Sharma 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Kamal Singh Rawat 7 years, 11 months ago

Search 'exam fear.com' on you tube

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Is board timetable released??????????

Posted by Sonal Nivsarkar 7 years, 11 months ago

CBSE > Class 12 > Physics

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V-I GRAPH

Posted by Pallavi Kumari 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Ruchika Gupta 7 years, 11 months ago

The graph between applied voltage and current is called V-I graph.

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Graph v-l

Posted by Pallavi Kumari 7 years, 11 months ago

CBSE > Class 12 > Physics

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What is fringes theory?

Posted by Subham Paul 7 years, 11 months ago

CBSE > Class 12 > Physics

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What is Impact Parameter?

Posted by Intekhab Anwar 7 years, 11 months ago

CBSE > Class 12 > Physics

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Nitin Murali 7 years, 11 months ago

The perpendicular distance between the initial velocity vector of the alpha particle and the Centre of the nucleus is impact parameter

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Charge and its property

Posted by Javad Ali 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Kamal Singh Rawat 7 years, 11 months ago

The amount of current flow x time called charge. Same charges repel each other and opposite charges attract each other. Charge neither created or nor destroyed in an isolated system

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Why copper not used to make potentiometer wire

Posted by Tannu Pal 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Kamal Singh Rawat 7 years, 11 months ago

Because Cu is easily heat up due to their high resistance.

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Electric charge is additive in nature why???

Posted by Satyam Shanu 7 years, 11 months ago

CBSE > Class 12 > Physics

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Why am does' note by ammeter

Posted by Anurag Singh 7 years, 11 months ago

CBSE > Class 12 > Physics

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Why transformer does not regulate dc current?

Posted by Dilpreet Singh 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Nitin Murali 7 years, 11 months ago

Ac power supply works well with high voltages and can be stepped up and down more easily than DC

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Combination of lens and mirror

Posted by Veerpratap Singh 7 years, 11 months ago

CBSE > Class 12 > Physics

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Transistor does not work in railway carriage . Why?

Posted by Kushal Jharwal 7 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Kushal Jharwal 7 years, 11 months ago

The railway carriage works as an electric screen. The electric field inside the carriage is zero and any change form outside in electric field cannot enter the carriage. Hence the electromagnetic signals do not find their entry in the railway carriage . Due to it , the transistor does not work in railway carriage

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The resistance of semiconductor would not be as high as that of insulator. Why?

Posted by Kushal Jharwal 7 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Kushal Jharwal 7 years, 11 months ago

At room temperature, some electrons in the valence band acquire thermal energy greater than energy band gap less than 3eV and jump over to the conduction band where they are free to move under the influence of even small electric field. Thus , the semiconductor acquires small conductivity at room temperature. So the resistance of semiconductor would not be as high as that of insulator

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Sakshi Rai 7 years, 11 months ago

Kyoki semiconducters m1 2 unpaired ekectron hote h..inme energygape insulater se thoda kam hota h...

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