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Force on a conductor in presence of an electric field

April 28, 2012 by physicscatalyst Leave a Comment

Force on a conductor in presence of an electric field
In presence of an electric field this surface charge will experience a force. If we consider a small area element of the surface of the conductor then force acting on area element is given by

Filed Under: Physics

Electric field due to charged conductor

April 28, 2012 by physicscatalyst Leave a Comment

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.

Filed Under: Physics

Vector Algebra 2

April 27, 2012 by physicscatalyst Leave a Comment

In this post we’ll lern Vector algebra in component form.
Component of any vector is the projection of that vector along the three coordinate axis X, Y, Z.

VECTOR ADDITION
In component form addition of two vectors is

Filed Under: Maths

How to solve Momentum and Collisions problems

April 22, 2012 by physicscatalyst Leave a Comment

Choose your frame of reference
Set up a coordinate system and define your velocities with respect to that system.It is usually convenient to have the x axis coincide with one of the initial velocities.
In your sketch of the coordinate system, draw and label all velocity vectors and include all the given information.
Write expressions for the x and y components of the momentum of each object before and after the collision. Remember to include the appropriate signs for the components of the velocity vectors.

Filed Under: Physics, Tips and tricks

How to solve Work And Energy/kinetic energy problems

April 22, 2012 by physicscatalyst Leave a Comment

Choose your frame of refrence.KE will differ in each refrence frame while PE will remains constant. Define your system, which may include two or more interacting particles, as well as springs or other systems in which elastic potential energy can bestored. Choose the initial and final points.

Filed Under: Physics, Tips and tricks

How to solve Newton’s Law problems

April 22, 2012 by physicscatalyst Leave a Comment

Draw a neat diagram of the system.
Firstly consider the origin of the forces acting on the each object.To do this find out the field forces acting on the each object.Wherever contact in available account the contact force carefully
Isolate the body whose motion is to be analyzed. Draw a free-body diagram for this body. For systems containing more than one objects, draw separate free-body diagrams for each objects

Filed Under: Physics, Tips and tricks

Motion and Rest: Definition ,Concept, How are they relative

April 22, 2012 by physicscatalyst 1 Comment

An object is said to be in state of motion if its position changes with the passage of time. If the position of the object does not change with the passage of time then the object is said to be at rest. We have now define what is motion and to describe it we consider simplest form of motion that is motion of any object in one dimension for example car moving on the road. To determine the position of car at different times , we could measure its distance from starting point and record all these observations. These observations can be recorded in form of a table or we can draw a distance versus time graph for the motion of the car and see how it is moving.

Filed Under: Physics, Tips and tricks

CBSE Scince Sample Papers 2012 for Class 12

April 18, 2012 by physicscatalyst Leave a Comment

CBSE Sample papers 2012 for Physics, Chemistry, Maths, Biology and Biotechnology is available in a PDF book format for download. You can download this eBook for free from the link below :

Filed Under: CBSE

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