MECHANICS

KINEMATICS

Graphs

2 Topics
PROJECTILE MOTION

Projectile Motion

6 Topics
NEWTON LAWS OF MOTION

Tension

2 Topics
Friction

2 Topics
Circular Motion

5 Topics
WORK,POWER AND ENERGY

MOTION OF SYSTEM OF PARTICLES AND RIGID BODY

Centre of Mass

3 Topics
Rotation about Fixed Axis

4 Topics
Translation + Rotation

6 Topics
Angular Momentum

4 Topics
GRAVITATION

Gravitational Field

4 Topics
Gravitational Potential

3 Topics
Gravitational Potential Energy

5 Topics
PROPERIES OF BULK MATTER

Fluid Statics

6 Topics
Surface Tension

8 Topics
Fluid Dynamics

4 Topics
Bernoulli Equation

3 Topics
Viscosity

5 Topics
THERMODYNAMICS

Thermodynamic Systems

3 Topics
Second Law of Thermodynamics

5 Topics
BEHAVIOR OF PERFECT GAS AND KINETIC ENERGY

Kinetic Theory of Gases

4 Topics
OSCILLATION AND WAVES

Waves

4 Topics
ELECTROSTATICS

Electric Field

3 Topics
Gauss Law of Electrostatics

7 Topics
Polarization of Dielectrics

3 Topics
Problems on Field Calculation

2 Topics
Electrostatic Energy

4 Topics
Problems on Work and Energy

5 Topics
CURRENT ELECTRICITY

Electric Current and Resistance

3 Topics
Combination of Resistors and Cells

3 Topics
MAGNETIC EFFECT OF CURREENT

FARADAY LAW OF EM INDUCTION

Problems on Faraday Law

5 Topics
MAGNETIC MATERIALS

Ferromagnetism

1 Topic
AC CIRCUIT

AC Circuit

6 Topics
ELECTROMAGNETIC WAVES

OPTICS

Fermat Principle

1 Topic
Thin Lens

2 Topics
Young Double Slit Experiment

7 Topics
DIFFRACTION

Single Slit

2 Topics
Double Slit

2 Topics
POLARIZATION

DUAL NATURE OF MATTER AND RADIATION

Photoelectric Effect

3 Topics
Wave Nature of Particle

3 Topics
ATOMS AND NUCLEI

H atom and X-rays

1 Topic
Problems on Radioactive Decay

2 Topics
ELECTRONIC DEVICES

Lesson Progress

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Force between two point charges (interaction force) is directly proportional to the product of magnitude of charges ( and ) and is inversely proportional to the square of the distance between them i.e., . This force is conservative in nature. This law is also called inverse square law. The direction of force is always along the line joining the point charges.

**Coulombâ€™s Law in Vector Form**

Suppose the position vectors of two charges and are and , then, electric force on charge due to charge is,

Similarly, electric force on due to charge is

Here and are to be substituted with sign. Position vector of charges and are and respectively where and are the coordinates of charges and .

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