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# Physics

Articles related to class 9, 10, 11, 12 and B.Sc.

## 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 […]

## Effect of Temperature on Drift Velocity in Conductors

Effect of Temperature on Drift Velocity In this article, we will discuss the effects of temperature on drift velocity in conductors. Introduction to Drift Velocity Drift velocity ($v_d$) is the average velocity attained by free charge carriers, like electrons, in a conductor due to an applied electric field. The equation for drift velocity is: v_d

## Screw Gauge physics experiment

Introduction

A screw pitch gauge is a precision instrument. It is used for measuring diameter of circular objects mostly wires, with an accuracy of 0.001cm. It consists of a hollow cylinder mounted on a U frame. The hollow cylinder leads to a ratchet which is meant for fine adjustment. The U frame consists of a flat end known as stud and a screw on the other side. This screw can be moved inside the nut by fitted in the U frame by rotating the hollow cylinder called the thimble. This is called the main scale. The hollow cylinder or the thimble is graduated into 50 or 100 equal parts. This is called the circular scale.

## Electric field due to charged conductor

We know that electric field inside a conductor is zero and any charge the conductor may carry shall be distributed on the surface of the conductor. For our discussion consider a conductor carrying charge on its surface again consider a small surface element ds over which we can consider surface charge density ? to be approximately constant.

## Meaning of alpha symbol in physics

Alpha Symbol Physics In this article, we will look into the meaning of the alpha symbol in physics. In physics and other scientific notations, various Greek alphabets are used to represent various physical quantities. Let us now have a look at what does Greek symbol alpha mean in physics. Alpha symbol Lowercase Alpha $\alpha$ Symbol

## Acceleration in a curvilinear motion

The acceleration vector has the same direction as instantanous change in velocity. Since the direction of the velocity changes in the direction in which the curve bends ,the acceleration is always pointing towards concavity of the curve
The acceleration in curvilinear motion can also be expressed in terms of two components

## Class 11 physics sample paper with solutions

Welcome to our webpage dedicated to providing Class 11 physics students with sample papers and solutions. On this page, you will find a variety of questions and answers, all prepared according to the CBSE Class 11 physics syllabus. PDF download of this sample paper is also available. This website offers a sample paper for class

## How to solve electric force and field problems

This post is all about how you can easily solve electric force and electric field problems. At a glance problems of physics can seem to be scary and overwhelming for some students but do not worry all you need to do is your willingness to solve problem. So first of all you need to read your problem carefully and then start using following protocol to solve your problems. The procedure I am going to write is for calculating electric forces but you can use the same procedure to calculate an electric field by simply replacing the charge of interest, q, with a convenient test charge and dividing by the test charge at the end. So, to calculate the force,