Archive of posts filed under the Class 10 category.

## CBSE Board and CCE FAQ -I

Question: Is it compulsory to appear in theory and practical papers in the compartment examination
Asnwer: In case the candidate has passed in the practical in the main examination, he/she is allowed to appear in the theory part only, and marks in the practical exam obtained at the main examination are carried forward and accounted for. In case a candidate has failed in the practical exam he/she shall have to appear in the theory and practical examination both irrespective of the fact that he/she has already cleared the theory examination

## Date Sheet for CBSE 2014 for X class

Date Sheet for CBSE 2014 for X class

## Quick Summary of General Mechanics Definition,Formula,Units and Dimensions

Quick Summary of General Mechanics Definition,Formula,Units and Dimensions

## Mirror and Lens Overview And Problems

Glossary of Mirror and Lenses

Plane Mirror
A plane mirror is a mirror with a planar reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence.It always form virtual image

Concave or Converging Mirrors
A curved mirror that has its center farther away from you than its edges is called a concave mirror. A concave mirror tends to reflect parallel rays through a point called its focus – in other words a concave mirror converges light. Therefore concave mirrors are often referred to as converging mirrors. This converging effect makes sense if you imagine a concave mirror to be an array of small plane mirrors.You can demonstrate the converging of parallel light rays by a concave mirror quite dramatically for yourself. A relatively small concave mirror placed in the sun will gather enough light to ignite a small piece of paper quite quickly

Convex or Diverging Mirrors

## The Age of the Universe( Big Bang)

One question has always fascinated the scientists ” When the universe began?” . Current Thinking believes that Universe began as a singularity in space and Time. The singularity is called as Big Bang. It is believed at this time everything was condensed into very small space. After that the Universe has been continuously expansion mode.

A Astronomer Edwin Hubble discovered in 1929 the rate of expansion of Universe i.e the rate at which the galaxies are receding from each other. That law is called Hubble Law. As per Law, if the two galaxies are at distance R,Their present relative velocity of separation is given by

## How to verify Ohm’s Law

We already know the statement of Ohm’s Law which is

“If the physical state of the conductor (Temperature and mechanical strain etc.) remains unchanged, then current flowing through a conductor is always directly proportional to the potential difference across the two ends of the conductor”

## Energy facts

1)The word energy comes from the Greek word energeia.
2)Most types of energy are either a form of kinetic energy or potential energy.
3)Common examples include heat energy, elastic potential energy, chemical energy, sound energy, nuclear energy, geothermal energy , gravitational potential energy and electric Potential energy
4) Kinetic energy refers to the energy an object has because of its movement. A Truck in motion has kinetic energy, as does a basketball when you pass or shoot it.

## 10 common mistake in Examination

1) Panicking Before Or During A Paper: Always prepare for a test or exam well in advance.Have a good night’s sleep before the date of the test or exam.Keep reassuring yourself that you can do it. Once you stop doubting yourself, you will stop panicking. If all else fails, comfort yourself that it is only a paper. It’s not the end of the world even if you don’t do well for just one paper.So just relax and Do some breathing exercise to relax

2.Failing To Scan Through The Questions Once: Do not immediately start answer the first question. Give yourself about 5 minutes to read through all the questions. Put a tick against the easy questions and a cross against the difficult ones. Then, proceed to answer the easy questions first! Always leave the difficult questions to the last. This ensures that you would have answered most of the questions in the paper should you run out of time. It also gives you more time for the difficult questions, as you would need relatively less time for the easy ones