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an atom in the ground state is excited by an electron beam of 12.5 ev energy find out the maximum number of lines emitted by the atom for its excited state

Posted by Gourav Thakur 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Derive the expression for the magnetic energy stored in an inductor when a current I develops in it. Obtained the expression for the magnetic energy density

Posted by Aman Singh 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Where i can get new syllabus if 2019-20 of cbse.

Posted by Karan Jindal 6 years, 11 months ago

CBSE > Class 12 > Physics

3 answers

Karan Jindal 6 years, 11 months ago

Thanks but that is too late

Sahana Sankaranarayanan 6 years, 11 months ago

You can search for it in cbse website or any website that gives you the syllabus

Sahana Sankaranarayanan 6 years, 11 months ago

Maybe after this academic year gets over

ANSWER

A great change in next year syllabus for class 12

Posted by Christin Mathew 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Is it write that CBSE offered 8 marks grace in physics 2019 paper

Posted by Rupesh Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Muskan Singla 6 years, 11 months ago

4 what????????

Sajanpreet Kaur Aulakh 6 years, 11 months ago

Yes Because deserves this

ANSWER

The sides of rectangle ABCD are 15 cm and 5 cm point charges of -5 Nano coulomb and +2 nano coulomb are placed at the vertices b and d respectively calculate the electric potential at the vertices a and c also calculate the work done in carrying a charge of 3 nano coulomb from a to c

Posted by Asif Hussain 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

physics ke paper me answer me agar question bhi likh de do board me no milenge kuch?

Posted by A B 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

K J 6 years, 11 months ago

Nhi

ANSWER

Is cbse is giving any grace marks in exam

Posted by Alisha Saini 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Himanshu Kain 6 years, 11 months ago

I have listened that 8 marks will be given forset 1and2

Sachin Kumar Sawera 6 years, 11 months ago

No

ANSWER

What does RADAR stand for ? Then write the most accurate clock?

Posted by Ashish Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Why can light travel in vacuum whereas sound cannot?

Posted by Mehak Chhabra 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Yogita Ingle 6 years, 11 months ago

This is because light is an electromagnetic wave and sound is a longitudinal and mechanical wave. In vacuum nothing is present. Sound needs either solid, liquid or gas to propagate and hence it is called a mechanical wave. Sound is a form of energy which is transferred by vibrating air molecules if motion of propagation is air. Air molecules themselves are not energy. But light is composed of photons and photons are energy themselves.
Photons can travel in any medium. Light is produced if there is any change in electric and magnetic field but sound is produced by vibrating body.
In short light itself travels from one point to another and hence do not need any medium but sound is transferred by vibrating bodies and hence need a medium to travel.

ANSWER

Which wave is used in RADAR

Posted by Bhumika Baghel 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Yogita Ingle 6 years, 11 months ago

Micro waves are short wavelength radio waves.
They are produced by special vacuum tubes(klystrons/magnetrons/Gunn diodes).
They are used in microwave ovens,and radar system in aircraft navigation.

Raghavesh Baskaran 6 years, 11 months ago

Microwave

ANSWER

what is an equi - potential surface??

Posted by Ďãřşháñăã Yadav ? ? ? 6 years, 11 months ago

CBSE > Class 12 > Physics

10 answers

Ďãřşháñăã Yadav ? ? ? 6 years, 7 months ago

.

Ďãřşháñăã Yadav ? ? ? 6 years, 8 months ago

____

Ďãřşháñăã Yadav ? ? ? 6 years, 9 months ago

what

Ďãřşháñăã Yadav ? ? ? 6 years, 9 months ago

I am so happy nd proud of myself

Ďãřşháñăã Yadav ? ? ? 6 years, 9 months ago

______

Ďãřşháñăã Yadav ? ? ? 6 years, 9 months ago

I am so happy nd proud

Ďãřşháñăã Yadav ? ? ? 6 years, 9 months ago

---

Ďãřşháñăã Yadav ? ? ? 6 years, 11 months ago

thanks

Kartik Periwal 6 years, 11 months ago

Also perpendicular to electric field lines

Sachin Yadav 6 years, 11 months ago

It is the surface in which potential is same at every point

ANSWER

An i get the phyiscs solution of set 3

Posted by Vijay Vijay Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Current is same for series combination.why?

Posted by Brahman Badsha Badsha 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Harshita Panwar 6 years, 11 months ago

Yes

ANSWER

Class 12th physics ka paper kesa hua

Posted by Virender Singh 6 years, 11 months ago

CBSE > Class 12 > Physics

3 answers

A Jaiswal 6 years, 11 months ago

Guys go and file petition to cbse for lenient correction of physics paper

Vijay Vijay Kumar 6 years, 11 months ago

Yes it is hard and lengthy too.

Parag Mukherjee 6 years, 11 months ago

Paper hard tha ao bakwas

ANSWER

Solutions of physics paper of this year set 55/2

Posted by Diksha Saraswat 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Define the term of angle of view

Posted by V Shukla 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Dimensional formula of electric flux in terms of charge

Posted by Nishant Mor 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Hows your physics exam????? Tough or easy ..

Posted by ???? ?? 6 years, 11 months ago

CBSE > Class 12 > Physics

5 answers

A Jaiswal 6 years, 11 months ago

Guys go and file petition to cbse for lenient correction of physics paper on link change cbse

Vijay Vijay Kumar 6 years, 11 months ago

Tough

Ashish Poonia 6 years, 11 months ago

Yar half mark cut raha hai

???? ?? 6 years, 11 months ago

110?????

Jewel Maria 6 years, 11 months ago

so easy ..i will score 110

ANSWER

when an electron in hydrogen atom jumps from the third excited state to the ground state how would the problem wavelength associated with the electron change justify your answer

Posted by Dinesh Aggarwal 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

What is the schematic diagram of alternating current

Posted by Aparna Rajendran 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

out of the two optical instruments microscope and telescope which one play the role in magnifying the object and in the resolving the two object keep close to each other

Posted by Vansh Karnwal 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Pragya Gupta 6 years, 11 months ago

Microscope

ANSWER

Why terminal voltage is less than emf

Posted by Mayank Sharma 6 years, 11 months ago

CBSE > Class 12 > Physics

2 answers

Karishma Patel 6 years, 11 months ago

Their is some potential drop due to internal resistance

Kartik Periwal 6 years, 11 months ago

Because of internal resistance in cell

ANSWER

How was the paper guys I hope you have started preparing for chemistry

Posted by Hanu Saini 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Devyanshi Khandelwal 6 years, 11 months ago

Tricky and tough

ANSWER

Section B and C ke liye attempt marks Kitna hoga

Posted by Shivam Kumar 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Five point charges +q are placed on five vertices of a regular hexagon of side l .find the magnitude of the resultant force on a chrge - q placed at the centre of the hexagon

Posted by Sonali Bhagat 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

Draw a graph showing the variation of current versus voltage in an electrolyte when an external resistance is also connected

Posted by Jaya Rai 5 years, 10 months ago

CBSE > Class 12 > Physics

1 answers

Binumol Rajeev 6 years ago

vv

ANSWER

Bohrs quantisation

Posted by Amar Agrawal Amar Agrawal 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

Himanshu Upadhyay 6 years, 11 months ago

mvr=nh/2π

ANSWER

Yrr physics k ppr mai writting itni gandi hui or phir b reh gya ..tumhara kesa hua?

Posted by Muskan Saxena 6 years, 11 months ago

CBSE > Class 12 > Physics

1 answers

G K 6 years, 11 months ago

Lengthy paper..........??

ANSWER

Like alpha decay beta decay IS bos decay in ou syllabus

Posted by Akash Joshi 6 years, 11 months ago

CBSE > Class 12 > Physics

0 answers

ANSWER

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