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What is the significance of permittivity

Posted by Navjot Kaur 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Ambuj Mishra?? 7 years, 1 month ago

The permittivity of free space is physical constant equal to approx. 8.85×10^-12(10 to the power-12) farad per meter(f/m). In general, permittivity is symbolised e and is a constant of proportionality that exist b/w electric field intensity in a given medium.

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Cbse previous years 2005 compartment

Posted by Banti Chauhan 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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how are x ray produced

Posted by Amit Raj 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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What is reflected rays

Posted by Nityanand Maurya 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Gopal Ji Mishra 7 years, 1 month ago

i am the student of B.Sc 1st year but still i am prepairing here and trying to give answar of your question. Reflected ray is the ray of light which is reflected by the mirror when we inident light on it.

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Stopping potential

Posted by Debapriyo Maity 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Sanjeet Yadav 7 years, 1 month ago

the minimum potential required to stop the current flow in one direction

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Types of wavefronts ,its definition,hyugen principles

Posted by Lakshay Sharma Lakshay Sharma 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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Why neutron is in centre with proton not with electron?

Posted by Kavindra Bisht 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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Calculate expression for electric field intensity at a point outside the hollow sphere

Posted by Rohit Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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Practicals of physics reading

Posted by Shivam Choudhary 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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What are dielectris?

Posted by Prativa Rai 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Gaurav Seth 7 years, 1 month ago

Dielectrics are non-conducting substances having negligible number of charge carriers. In presence of an external electric field, dipole moments are induced in dielectrics by stretching and re-orienting the molecules of the dielectric.

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Marking weightage of only "wave optics".??

Posted by Mayank K. Mahour 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Tannu Sehwag 7 years, 1 month ago

I think its not fixed like ray+wave both have 14 marks 1x2marks+ 2x2 marks+3 marks+5 marks

3Thank You

Mansi Sharma 7 years, 1 month ago

Same qieation

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Why is diode called a valve

Posted by Sudhansu Pandey 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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A long straight current carrying wire passes normally through the center of circular loop. If the current through the wire increase,will there be an induced emf in the loop? justify.

Posted by Vignesh Vignesh 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 1 month ago

No because magnetic flux of loop linked with wire is zero

3Thank You

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Which one is the main derivation of particular chapter.

Posted by Vagish Kumar 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Simran Baidwan 7 years, 1 month ago

Almost all derivations are important specially of unit 6,2,4

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Calculate the value of potential difference (va-vb)

Posted by Viprakumar Mishra 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Shaima Ameen 7 years, 1 month ago

ur ques is not appropriate

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What is electric flux.

Posted by Prabhat Yadav. Vikash 7 years, 1 month ago

CBSE > Class 12 > Physics

5 answers

Sunil Moond 7 years, 1 month ago

The electric flux link with any surface is defined as the no of electric field lines passes through that surface.

Jagdeep Virdi 7 years, 1 month ago

The total number of electric field lines passed through that surface is called Electric Flux.

Shaima Ameen 7 years, 1 month ago

the total no of electric field lines passing through an area normally to it

Vishesh Pal 7 years, 1 month ago

The total number of electric field lines crossing or passing an area normally is called electric flux. The strength of electric field is called electric field intensity

Kshitij Bajpai 7 years, 1 month ago

The measure of feild line passing through an area when held normal is called electic flux

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practical related tips

Posted by Mehak Dangoria 7 years, 1 month ago

CBSE > Class 12 > Physics

3 answers

Tannu Sehwag 7 years, 1 month ago

Just watch some videos on yt Learn apparatus,obeservation table,conculsion,result and precautions..

Gyandeep Srivastava 7 years, 1 month ago

Go freely learn basic concepts of syllabus only.... you get totol

Chakshu Sharma 2204 7 years, 1 month ago

Learn all the experiments written in the practical book

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Are additional questions also help for boards?

Posted by Shivanshi Singh 7 years, 1 month ago

CBSE > Class 12 > Physics

1 answers

Lavanya Balasubramanian 7 years, 1 month ago

Yes especially in physics go through the additional exercise

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Basic idea of internet, mobile telephony and GPS

Posted by Anand Sharma 7 years, 1 month ago

CBSE > Class 12 > Physics

0 answers

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What does negative susceptibilty signifies ?

Posted by Chakshu Sharma 2204 7 years, 1 month ago

CBSE > Class 12 > Physics

2 answers

Shubhankar Kumar 7 years, 1 month ago

Substances with negative susceptibility signify that they are repelled by magnets.

Shubhankar Kumar 7 years, 1 month ago

susceptibility is the ratio of intensity of magnetization induced in the material to the magnetizing force applied on it. It is denoted by Xm. i.e.---- Xm=I/H Where magnetization=I , magnetising force=H