What is an Identity An identity is an equality, which is true for all values of the variables in the equality. While an equation is true only for certain values of its variables. An equation is not an identity. Example x+ 2 =5Now this is true for x=3 only.So this is not an identity$(x+1)^2 = […]

## Algebra Formula for Class 8

Algebra consists of the following topics in Class 8 .(a) Linear equation(b) Laws of Exponents(c) Algebraic Expressions and Identities(d) FactorizationHere are Algebra Formula for Class 8 topic wise Linear Equation What is Linear equation in one Variable We will restrict the above equation with two conditions (a) algebraic equation in one variable(b) variable will have […]

## What is graph in physics?

In this article learn about the what is graph in physics and how to plot a basics of graphs in physics. Here you will learn aboutÂ Why we need graphs What are graphs and How to plot graphs After reading this article students would be able to define graphs and plot graphs using data on […]

## What is trajectory

Introduction to the concept of trajectory A trajectory is the path followed by an object with mass in curvilinear motion (curved path) as a function of time. Mathematically ,It is defined by the equation in x-y coordinates. A famous example would be projectile motion like the ball thrown an angle or a bullet fired from […]

## Factors of 75 | Prime Factorization of 75

Number 75 is a composite number and we will find how to find the factors of 75 . We will also technique to find out the Prime factorization of 75 easily Factors of 75 A factor of a number is an exact divisor of that number. So factors of 75 are the number which are […]

## How to find work done by Multiple forces acting on a object

This can be done in these simple steps

1) First draw a free body diagram of the body showing all the forces on it.

2) Carefully choose a X-Y coordinate system so that direction of the motion or direction of force lies in X or Y direction. This will simplfy the Problem

3) Applying Newton’s law find out any unknown forces

## Revise During Preparation For Exams

You might be good at studies and have ability to learn fast , even the subjects that are considered tough like physics , mathematics, computer science e.t.c., or you might be the one struggling to learn these subjects. This article is for all those who are preparing for one exam or the another. Now once you complete understanding your topic you were studying , you move to another one and then to another one. After a week or two of continuously studying or learning new topics each day you now try to solve problems related to topic you studied two or three weeks back.

## Reverse breakdown in PN Junction

When a PN junction is reversed biased it allows very small current to flow through it. This current is due to the movement of minority charge carriers and it is almost independent of the voltage applied.

If reverse bias is made too high, the current through PN junction increases abruptly and the voltage at which this phenomenon occurs is called breakdown voltage .