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

Capacitor is an arrangement of two conductor having equal and opposite charges seperated by an insulating medium. Also in addition it is used to store electri charge and electric energy and to make LC oscillator! I hope it make sense to you.

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Ek gal dasso cells in series and parallel ke derivations puch sakte hain kya? Like it's been never asked in previous year so....?

Posted by Shruti Jha 6 years ago

CBSE > Class 12 > Physics

7 answers

Nikita Beniwal 6 years ago

It already come in 2018

1Thank You

Shruti Jha 6 years ago

Thank you, Muskaan! All the very best to you too?

1Thank You

Muskaan Vig 6 years ago

Welcome shruti?all the best..

1Thank You

Shruti Jha 6 years ago

Wokays! Thanks Sufiyan, Khushi and Muskaan?.

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Sufiyan Ali 6 years ago

Cells in parallel may be is year rakha ho skta h... So dont skip derivation

1Thank You

Khushi Singh 6 years ago

Yup may be.... There is no pattern of the questions asked in cbse board papers so...

1Thank You

Muskaan Vig 6 years ago

No ,they are only for our knowledge ....

1Thank You

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Forces between multiple charges in electric charge and field

Posted by Abdul Rahim 6 years ago

CBSE > Class 12 > Physics

3 answers

Killer Xmarty 6 years ago

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Shruti Jha 6 years ago

Apply principle of superpostion!

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Sufiyan Ali 6 years ago

force on any charge due to a number of other charges is the vector sum of all the forces on that charge due to other charges are taken at a time The individual forces remain unaffected due to other charges presence This method is called the principle of superposition

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CBSE 12 Physics 2008

Posted by Athena Phibs 6 years ago

CBSE > Class 12 > Physics

1 answers

Shruti Jha 6 years ago

???

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Logic gates explanation

Posted by Vijaylaxmi Chaurasia 6 years ago

CBSE > Class 12 > Physics

2 answers

Sufiyan Ali 6 years ago

This part is removed this year

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Âññü Šîñg*H??? 6 years ago

y topic syllbs s remove ho gya h

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Important numerical of magnetism

Posted by Siya Kri 6 years ago

CBSE > Class 12 > Physics

1 answers

Shruti Jha 6 years ago

Refer NCERT examples snd pervious year!

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What are velocity filter

Posted by Rahul Yadav 6 years ago

CBSE > Class 12 > Physics

1 answers

Tamanna Sharma 6 years ago

Arrangement of electric and magnetic field perpendicular to each other so that we can select the velocity of incoming charge particle according to our need.

1Thank You

ANSWER

Along the electric field only magnitude of potential or potential itself decreases?

Posted by Mitali Singh 6 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Hello peers! Is there anyone whose boards are from 24th of feb?

Posted by Shruti Jha 6 years ago

CBSE > Class 12 > Physics

22 answers

Killer Xmarty 6 years ago

Apna bhii do sat jaye

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Killer Xmarty 6 years ago

Hoga

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Shruti Jha 6 years ago

Rameez i can't do all this. Mujhse nahi hota. So please!

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Killer Xmarty 6 years ago

???

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Shruti Jha 6 years ago

???

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Rameez Khan 6 years ago

Kya sweetheart

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Shruti Jha 6 years ago

Hii

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Rameez Khan 6 years ago

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Rameez Khan 6 years ago

Hoo j

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Shruti Jha 6 years ago

Hello there!

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Rameez Khan 6 years ago

Hii jn

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Shruti Jha 6 years ago

Wokays, Arzoo! All the very best.

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Killer Xmarty 6 years ago

24 feb

1Thank You

Shruti Jha 6 years ago

Okay, Annu!

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Âññü Šîñg*H??? 6 years ago

mine from 24 feb?

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Tapan Pandey?? 6 years ago

Mine from 27 feb

1Thank You

Meghna Sharma 6 years ago

Am from Haryana

1Thank You

Shruti Jha 6 years ago

That's why! I am from Gujarat. Thank you and All the very best to you too. Hope you guy's make it.

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Meghna Sharma 6 years ago

Thanking u too ayaan

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Meghna Sharma 6 years ago

Thanks shruti

1Thank You

Shruti Jha 6 years ago

Oh! Okay okay. All the Best,Meghna!?

1Thank You

Meghna Sharma 6 years ago

No mine starts from 20 feb

1Thank You

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I don't know anything about physics How can I cover up this subject to compete in boards exam 2020

Posted by Saurav Kumar 6 years ago

CBSE > Class 12 > Physics

6 answers

Tapan Pandey?? 6 years ago

Oye.... Firstly complete your 2nd part. Then magneto and after that electrostatic

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Meghna Sharma 6 years ago

Physics exam is on 2 march

1Thank You

Shruti Jha 6 years ago

No my board exams are starting from 24th feb onwards!

1Thank You

Riya Rana 6 years ago

Yess true ayaan... ??

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Riya Rana 6 years ago

Secondly there aint any time left so that you can cover the ENTIRE syllabus at this peak time.... So try to cover maximum number of important topics plus previous yrs but tbh you wouldnt be able to score high bcoz there are like only 10 days left in starting of board exams (not demotivating) but you should have realised it earlier anyways cover as much as you can... Good luck doing that ...!!

1Thank You

Riya Rana 6 years ago

First of all... Good morning... :-/

1Thank You

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i have only 6 days to learn physics and i've not learnt anything. should i solve last 10year que pprs or go through chapters

Posted by Sachi Pandey 6 years ago

CBSE > Class 12 > Physics

3 answers

Palak Batra 6 years ago

yes thus can help u very much...and imp derivations and numericals type can also be able to understand..

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Riya Rana 6 years ago

Previous years are important as well..

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Shruti Jha 6 years ago

No! Firstly go for laws and derivations so that you can have some idea on how to deal with questions. Than you can do previous year solved paper. All the Best!

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(a) (i) A circular loop of area vector A, carrying a current I is placed in a uniform magnetic field vector B. Write the expression for the torque vector τ acting on it in a vector form.

Posted by Mahi D 6 years ago

CBSE > Class 12 > Physics

4 answers

Tamanna Sharma 6 years ago

When the field and circular loop plane are perpendicular to each other, at this time area vector and field parallel to each other and hence ( cos 0) max value for flux ,here

2Thank You

Shruti Jha 6 years ago

Expression for the torque will be M×B vector.

2Thank You

Mahi D 6 years ago

Pls answer the second part.

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Mahi D 6 years ago

(ii) If the loop is free to turn, what would be its orientation of stable equilibrium? Show that in this orientation, the flux of net field (external field + the field produced by the loop) is maximum.

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Electrostaics

Posted by Arjun Kumar 6 years ago

CBSE > Class 12 > Physics

3 answers

Apoorva Rao 6 years ago

It is the study of electric charges at rest

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Nancy Verma 6 years ago

Sorry os nhi is hai

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Nancy Verma 6 years ago

Electrostatic os a branched of physics that study electric charge at rest

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Semiconductor ke 14.8 14.9 ka ans bta do bhai lo NCERT ka

Posted by Nancy Verma 6 years ago

CBSE > Class 12 > Physics

1 answers

Shruti Jha 6 years ago

50 Hz for half wave and 100 Hz for full wave.

3Thank You

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Transistors are not in syllabus but still even in latest sample papers of CBSE there are questions related to it. So should prepare that topic or not?

Posted by Nancy Kansal 6 years ago

CBSE > Class 12 > Physics

6 answers

Nancy Kansal 6 years ago

Thanks to all of u?

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Palak Batra 6 years ago

not at all ..no need to do transistor..

1Thank You

Tamanna Sharma 6 years ago

2Thank You

Amit Kushwaha 6 years ago

by mistkly some question came

1Thank You

Amit Kushwaha 6 years ago

1Thank You

Ankit Singh 6 years ago

1Thank You

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Tell me topics of 8th unit

Posted by Preet Dhillon 6 years ago

CBSE > Class 12 > Physics

0 answers

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The half Life period of a radioactive element is 25 days. what is the time taken for 15/16th of its original mass to disintegrate?

Posted by Subham Sapkota 6 years ago

CBSE > Class 12 > Physics

3 answers

Palak Batra 6 years ago

100 days

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Neha Choudhary 6 years ago

T half =25 days N/No=1-15/16=1/16 =1/2^4 =1/2^4=1/2^t/25 T=100

1Thank You

Muskaan Vig 6 years ago

100 days....

1Thank You

ANSWER

physics paper 2019

Posted by Golu Gagan 6 years ago

CBSE > Class 12 > Physics

1 answers

smit****@***** 6 years ago

Download class 12 board paper from play store

2Thank You

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Meaning of induction

Posted by Rishabh Singh 6 years ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Calculate the charge carried by 12.5x10^8 electrons

Posted by Priyanshu Raj 6 years ago

CBSE > Class 12 > Physics

2 answers

Nancy Verma 6 years ago

Use the formula q =ne where e =1.6×10^-19

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Priyanshu Raj 6 years ago

2x10^-10 C

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Is moving coil galvanometer is there in syllabus of class 12 session 2020 ?

Posted by Prikshit Kumar 6 years ago

CBSE > Class 12 > Physics

4 answers

Nancy Verma 6 years ago

Yes it is in syllabus

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smit****@***** 6 years ago

Yaa

1Thank You

Subhendu Mandal 6 years ago

Yes

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Tamanna Sharma 6 years ago

Yes

1Thank You

ANSWER

What is Brewster formulas

Posted by Supriya Singh 6 years ago

CBSE > Class 12 > Physics

4 answers

Sejal Dhakad 6 years ago

Brewster angle = u=tan(i)

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Amit Kushwaha 6 years ago

Tan p equal to n1 /n2

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Subhendu Mandal 6 years ago

tan(angle of polarisation)= refractive index

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Yogita Ingle 6 years ago

Brewster’s law:- Brewster’s law states that at any particular angle of incidence, reflected ray is completely polarized; and the angle between reflected and refracted ray is 90⁰.

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Is amplifier is in the syllabus of +2

Posted by Nitish Kathuria 6 years ago

CBSE > Class 12 > Physics