## Mathematics revision sheet for class 11 and class 12 physics

This mathematics sheet would be helpful for quick revision of most of maths formulas needed before class 11 and 12 physics examination. It covers quick and much needed formulas on differentiation , integration, trigonometry, AP, GP etc.

## Class 12 CBSE conceptual questions for board exams

This post contains conceptual questions for class 12 board exams although anyone can solve them if interested.
Try to solve these questions on your own in my net post I’ll publish 3 marks and 5 marks sample questions.

Question 1. W cm apart on a hat is the amount of work done in moving 100 nC charge between two points 5 cm apart on an equipotential surface?

## Meter Bridge Experiment using Wheatstone Bridge Principle

What is Wheat Stone Bridge? A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. it was invented by Samuel Hunter Christie in 1833 and improved and popularized by Sir Charles Wheatstone in 1843.Although today digital multimeters provide the simplest way to measure a resistance, … Continue reading Meter Bridge Experiment using Wheatstone Bridge Principle »

## How to solve resistor in series problems

Here in this article we will go through a easy problem showing the basics how to solve the problems where resistors are connected in series and you have to find the equivalent resistance of the circuit. we will do this through an example . For this consider studying the question given below and how I solve this question following several steps. Here our goal will be to analyze few resistors connected in series combination. Further If you want to read the notes related to this topic please follow this link

## CBSE Class 12th Physics Full Length Sample papers for Board Examination

We have published 10 free CBSE Class 12 Physics Full Length Sample papers. Link are given below

## Use of concept of electric potential

We already know about electric field and electric potential. We also know that electrostatic field is completely characterized by vector function E(r). The electric field depicts the force exerted on other electrically charged objects by the electrically charged particle the field is surrounding. Now a question arises why do we need introduction of electric potential when we already have electric field for the description of electric force between charges.

## CBSE will provide evaluated Answer Sheets for class Xth and XIIth Board examinations

The Central Board of Secondary Education (CBSE) is providing photocopies of Evaluated Answer Book(s) to students who have appeared for their Board Examinations in 2012. However, standard Xth students will get their evaluated answer sheets only after information regarding marks has been blocked out, keeping in line with the Boardâ€™s grading policy where actual marks are not disclosed.

## What are light emitting diodes?

A LED is a forward biased P-N junction diode which emits visible light when energized.

A light-emitting diode (LED) is a semiconductor light source. LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. Introduced as a practical electronic component in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness.