The flow of charge in an electric circuit signifies the existence of electric current in that circuit. We can define electric current as the rate of flow of electric charges (electrons) in a conductor (for example copper or metallic wire). Flow of charge definition The flow of charge is the process of supplying or adding […]

## Difference between resistance and resistivity

In this article, we will learn about the difference between resistance and resistivity. Students first come across these terms while studying Electricity where the concept of electric current, resistance and resistivity are introduced. For the basic introduction visit our notes on electricity. TLDR – Too Long Don’t ReadBoth resistance and resistivity describe how difficult it […]

## Algebraic Identities

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