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TITLE PAGE
Table of Contents
AIM    3
Introduction    3
Test and measurement method………………………………………………………………………………….3
Experiments ………………………………………………………………… 3
Procedure………………………………………………………………………4
Analysis and discussion of results………………………………………………………4
Value of charges are changed…………………………………………………4
Distance is changed…………………………………………………………….5
Value of Coulomb constant……………………………………………………6
Finding the direction of Force…………………………………………………7
Questions………………………………………………………………………...8
Electrostatic force in hydrogen atom and atomic scale………………………9
Conclusion………………………………………………………………………………10
References……………………………………………………………………………….10
Experiment: Coulomb’s law
1. Aim:
The aim of this virtual experiment is to
· Visualize the electrostatic force and coulombs law.
· Understand the dependence of force on distance, type of charge and quantity of charge.
· Understand the force property.
· Calculate the forces at atomic level.
2. Introduction
The electrostatic force can be calculated using coulomb law which is an empirical formula based on the experiment done by Coulomb. It states that when the two charges are separated by the distance r and having the charge they apply the force on each other which is equal and opposite to each other and which is directly proportional to product of charges and inversely proportional to square of the distance of separation.
Electrostatic force is directly proportional to product of charges.
Electrostatic force is inversely proportional to the square of distance between two charges.
Electrostatic force on two point charges are found out by coulombs Law and is equal to
Where F is the force
is the charge on first body
is the charge on second body
And r is the distance between charges.
    
        
It also follows the below given law,
· Like charges repel each other
· Unlike charges attract each other.
Since the force is a vector quantity the direction and magnitude both must be defined well.
The virtual lab simulation is performed in a PHET interactive simulations to fulfill the aim of the experiment.
3. Test and measurement method
3.1 Experiments
1. Distance value has to be kept constant and charges are to be changed to get the relation between force and charges.
2. Distance value is changed keeping the charges constant to get the relation between distance and force.
3. Charge type is changed, both are kept positive and negative and then one is kept positive and other is kept negative to get the direction of force.
4. The electrostatic force at the atomic level is calculated for the hydrogen atom.
3.2 Procedure
· The coulombs law experiment is opened in PHET interactive simulation site.
· It consists of two types
· Atomic scale
· Macro scale
· For two charges kept at a measurable distance the macro scale is chosen and experiments were...