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DON’T WORRY NOW. CBSE RESULTS MAY A TAKE A FEW MORE DAYS TO COME

We could see a hurry to schools and other centres by students and parents regarding the declaration of results. The confusion created by some schools by saying that CBSE is going to declare the result on 15 May caused the havoc.

Don’t worry now. CBSE results may a take a few more days to come.

CBSE has already given a statement that results will be declared before 26 May 2014. So, let;s wait a few days without panicking.

Let’s hope a very good result this time.

Can the frictional electricity produced during landing of a plane be used for constructive purposes?

As we know that in aeroplane during landing the charged produced in it due to the friction with ground are earthed through its wheels; can this charge be stored with the help of a capacitor and used for useful purpose?

I feel that this is a metter for research.

If you feel otherwise and know some method to tap this potential, please post.

Solutions to HC Verma’s Concepts of Physics – Weblinks

We found the following website links which offer solutions to HC Verma’s Concepts of Physics.

Though there are some errors and omissions, these links will help at least get ideas which lead towards the solution. Students are advised to try to solve the problems themselves and consult the solution only if they are not getting the correct answer. Please satisfy your own knowledge and understanding before believing on any online solutions.

Please bring to our notice if you find any error in these online solutions.

Weblinks for Solutions to H C Verma’s Concepts of Physics

Rotational Mechanics – HC Verma’s Concepts of Physics – Solution

HC Verma’s Concepts of Physics – Chapter 10 – Question 15

Find the moment of inertia of a uniform square plate of mass m and edge a about one of its diagonals.

The question was posted by Ankit

Solution:

Let the moment of inertia about the axis through the centre of the square plate perpendicular to the plane, assumed to be along Z axis, be I. Now the square plate will be in the XY plane. Let the X axis and Y axis be parallel to the edges and passing through the centre.

Then, we know that Ix = Iy = ma2/12

Then, according to perpendicular axis theorem,

Iz = Ix + Iy = 2Ix=2ma2/12=ma2/6

Now, imagine that X and Y axes are along the diagonals. (The diagonals of a square are also mutually perpendicular.)

Again, according to perpendicular axis theorem, Iz = Ix + Iy = 2Ix

The MI about the diagonal about its diagonal, Ix = Iz/2 = ma2/12

What does a rheostat control?

What does Rheostat controls? electron drift velocity or quantity of electrons?

We know I=nAve
I=current
n=quantity of electron
A=conductor area
e=electron charge
v=drift velocity

What is Physics 212 ?

Were you searching for Physics 212?

http://online.physics.uiuc.edu/courses/phys212/spring12/

Physics 212 is the Physics Course on Electricity and Magnetism by University of Illinois.

(Many other colleges and universities may have a couse by the same name but dealing with different topics in Physics.

The advantage of Physics212course of Illinois is that many course materials and animations etc are available online and can be used by any prospective student.

http://research.physics.illinois.edu/per/ie_100.html

CBSE Class X SA 1 conducted under CCE

Image via Wikipedia

Download CBSE Class X SA 1 2010 – 2011conducted under CCE by KVS Chennai Region

Given in both English and Hindi

CBSE X SA I Science 2010 – 2011