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This course is meant to give a comfortable and smooth start to your Maths basics, as needed for Physics .

Topics explained with colorful images and animations :-

1) Graphs of various shapes , and how to find the slope :- a) straight line graph, b) exponential curves, c) Hyperbolic curves.

Maxima and Minima points for curves.

2) Trigonometry :- a) sine, cos and tan. b) example:- sine of a continuously varying angle (as applied for a wave equation)

3) Integration - why is it so great a concept, how does it help you.

4) Differentiation - why is it so great a concept, how does it help you.

1) This course starts with explaining the SI system of Units, the 7 major units corresponding to the 7 Fundamental Quantities in the physical world.

2) There are images to show Mass Measurement, different from weight units.

3) There is an explanation of Least Count and Parallax error.

4) There is an animation on Vernier Caliper and how it is useful as a measuring instrument.

This course gives you interesting images and animations to explain clearly a number of things :-

1) Displacement versus Distance: the difference

2) Important types of Motion - a) along a Horizontal / Vertical plane , a straight line motion , b) along a plane, but a zigzag motion, c) circular motion, d) Projectile motion.

3) Projectile Motion or Parabolic Motion :- two animations show parabolic motion :-

a) Aircraft dropping a food packet for people

b) Basketball throw by an amazing player.

In case (a) , the vertical and horizontal velocity vectors are shown changing dynamically at every instant, to help with the concept of Resultant Vector changing dynamically with time, and therefore the Resultant Flight path of the object . The difference between "g" in vertical direction versus no acceleration in horizontal direction is explained, and is the key to understanding projectile motion.

Summary covered:

1) Gravitational Forces , such as between any two Masses. Bid case studies are heavenly bodies in space. Example- Earth and Sun, Moon and Earth.

2) Electromagnetic forces

3) Nuclear forces. - these act between Protons and Neutrons. Holds a Nucleus of an Atom together.

4) The other types of forces are also shown in 3D images and solid models . Example: Hydrostatic forces acting on a body submerged in water.

5) Electrostatic forces (Coulomb Forces) between electrically charged bodies .

This course gives a strong foundation to understand Newton's 3 Laws of Motion , and to apply them in practical problems.

1) 1st Law of motion

2) 2nd Law of motion

3) 3rd law of motion.

4) Pseudo forces.

5) Inertia.

Understanding "FRAME of Reference" such as Inertial and Non-Inertial is very important. This abstract topic is also covered under the chapter "Rotation" or "Rotational Mechanics".

The following topics are covered:-

3) Practical: Laboratory Experiment to measure Friction co-efficient.

Solved problems and test questions are included at the end.

This course makes things very visible and easy to understand the basics of circular motion :-

1) Angular velocity, and acceleration Vectors :- Animation of a rotating disc as well as animation of a cut-section of the earth rotating is included inside the course to give a solid feel of rotation and vectors . Equations are included, of course.

2) What's the difference between Linear Velocity, Acceleration and the Angular velocity and acceleration:- this is explained in animation.

3) Apparent weight of objects :- due to earth's rotation, is explained with the help of a rotating 3D model animation.

4) Banking of Tracks :- an interesting animation of a fast car moving on an angled track is shown, to strengthen the concept . Equations are of course described.

an example below:-

This course explains the following concepts with equations :-

1) Work done . example- a alien robot pulls a block over a patch of ground.

2) Energy : potential energy and kinetic energy.

3) Work-Energy theorem : the definition of Work as rate of change of Kinetic Energy.

4) Power : see definition , concepts, and some animation examples like : a) a gear and chain , b) lots of gears in a transmission.

5) Spring Force : work done by a spring.

6) Difference between Conservative versus non-conservative forces.

7) Pendulum : Animation shows potential energy getting into kinetic energy and vice versa when it is oscillating.

8) solved problems are at the end. Test questions are given in a separate section. Use it to improve your confidence, skill and speed.

Summary of topics covered:-

Solved problems, and test questions are included at the end.

This course explains clearly about several topics that normally can be difficult to grasp. Animations and images of rotating 3D objects with vectors moving , make it much easier to understand.

This fundamental course explains about the gravitational forces that bind us to the planet. Animations and images are included for the earth’s rotation around the sun in orbit, and other examples.

This course is important as many things like springs, even waves follow Simple Harmonic Motion. Animations of springs in different modes, pendulum etc , make it easier to get a real feel for oscillation and periodic motion

Following topics are covered:

This course makes it much easier to understand and remember fluid behaviour, both in static condition and in moving condition. Following topics are covered:

This course explains a material's innate properties like Elasticity, Strength, stress, strain etc.

This course explains aboutwaves and wave equations. Animations show the wave moving and the basics of waves such as amplitude, frequency, velocity. A Sonometer and basic principle of a Laboratory experiment is shown, with equation.

This course explains aboutsound waves , how they move. Sound waves are typical and different from other types of waves . Learn about sound velocity, amplitude, frequency , pitch . Animations are included to show the sound wave moving .

This course explains about light and how it was proved in Young's Double Slit experiment that light must have wave properties.

This course shows animations and images to describe the reflection and refraction of light.in Mirrors and Lenses. Learn about Mirrors and reflection ,Lenses and refraction.

1. Reflection at convex and concave mirrors

2. Image formation, focal length, equations.

3. Refraction at plane surface :- critical angle.

4. Refraction through a Prism

5. Refractive index and Angle of Minimum deviation.

6. Refraction through spherical surface.

7. Refraction through convex and concave Lens :-lensmaker’s formula.

8. Magnification, and power of lens.

9. Two thin lenses in line

10. Blurring :- Monochromatic aberration

11. Chromatic aberration.

This course makes it really easy to understand Optical instruments.

1. Telescopes RAY DIAGRAMS with animation - a) Astronomical Telescope, b) Terrestrial Telescope

2. The 3 main types of Astronomical telescopes are explained.

3. Magnification concept is explained.

4. Microscope - Simple and Compound

5. Equations for Magnification.

6 . Difference between Resolving Power and Magnification.

This course explains about Dispersive Power of prism materials.

This course explains about the great significance of the Speed or Velocity of light, and how scientists found amazing experimental methods to measure this highest speed ever found in the universe.

See the crystal clear animations , almost a first of its kind, that show you how the light waves move from source to the very end.

Also included is a video about a calculation of Speed of Light mentioned in The Rig Veda, an extremely ancient Indian sacred Text, said to be more than 7000 years old. Experience the mystery of how this level of top-end calculation was available with mankind at that time.....

This course explains about the light and other radiation, the brightness /luminosity.

This course explains the basics of temperature and Heat- more appropriately to be called Thermal Heat Transfer, another kind of energy.

Topics covered are :

This course explains in detail about behaviour of molecules in a gas. Animations and images are included to show clearly the movements that are helpful to understand things like collisions of molecules against walls of a container and gas pressure .

Topics covered are:

This course describes the specific heat at constant pressure and at constant volume.

Solved problems and test questions are given at the end.

Example image of gas molecules internal energy (animation provided inside the course) :

This course describes the types of heat transfer : Conduction, Convection, radiation. .

This subject is difficult usually. This course starts with an image and animation to show electric charges, and goes on to the concept of electric field strength, and electric potential. Just like gravitation, wherever there is a kind of force, there will be energy, so electric potential energy is necessary to understand.

1. Electric charge, units

2. Coulomb’s Law

3. Electric field

4. Lines of electric force

5. Electric Potential energy

6. Electric potential

7. Relation between electric field and potential

8. Electric dipole

9. Electric field due to dipole

10. Torque on a dipole kept in an electric field.

11. Conductors, Insulators and Semi-conductors.

12. Electric field inside a conductor.

A sample image is given below , for a charged sheet :-

This is one of the difficult(and hated) topics. But students have to be helped to get on top of it. This course makes it easier. The images/videosstart from scratch and go on to explain a Gaussian surface and how it can be used practically.

1. Flux of electric field through another surface

2. Gauss’s Law

3. Flux at a point outside a closed surface

4. Applying Gauss’s Law to find equation for Electric Field in various situations :- a) charged conductor, b) charged sphere, c) long wire/cylinder, d) plane sheet of charge. e) outside a charged plane conducting sheet.

5. Comparison: electric field of a charged sphere , with that of a point charge at centre.

6. Electric potential energy of a charged solid sphere.

7. Electric potential energy of a charged spherical SHELL.

8. Earthing.

Sample image of Gaussian surface wrapped around an electric field:-

This is a ‘must do’ course for getting a good hang of electronics and electrical . This course includes interesting animations to explain capacitors , what they are , how they work, and a basic DC circuit. (you can find more on AC electrical circuits fitted with capacitor , in a subsequent course - chapter 39.) Following topics are covered:

1. Capacitor types, use of a dielectric, and Capacitance.

2. Capacitor in a simple circuit with a DC battery.Working of a switch.

3. Charging and discharge graphs.

4. Capacitor in a AC circuit.

5. Force between plates of a capacitor.

6. Energy stored in a capacitor.

7. Dielectric materials and constant ‘K’.

8. Van de Graff Generator

Sample image ofa parallel plate type capacitor in a DC circuit:-

This course includes very important things like Ohm’s law and Kirchoff’s Laws for circuits. Interesting animations help to get a feel of resistances, series and parallel circuits, and circuits with junctions .A section on capacitors charging and discharging, is included here too.

1. Current and current density

2. Ohm’s law

3. Resistivity, and effect of temperature.

4. Battery and emf concept.

5. Electrical Energy

6. Kirchoff’s Laws

7. Resistors, series and parallel circuits.

8. Grouping of batteries.

9. Wheatstone bridge.

10. Ammeter and Voltmeter.

11. Stretched wire potentiometer.

12. Capacitors - charging and discharging.

Sample image of a DC circuit with battery and 2 resistors in parallel :-

This chapter talks about the Thermal and Chemical Effects of Electric Current.

1. Joule’s Laws. 2. Practical: Experiment to verify Joule’s Law.3. Seebeck effect.4. Thermoelectric series, current flow in cold and hot junctions.5. Thermocouples.6. Peltier effect.7. Thomson effect.8. Electrolysis, electrolytic cell.9. Faraday’s laws of electrolysis.10. Practical: Experiment to verify Faraday’s Laws.11. Faraday’s laws and ionic theory.12. Faraday constant.13. Voltameter. 14. Primary and secondary cells.15. Lead acid cell.

Visualising the magnetic lines of force and the field helps in understanding the concept. Images/animationsof charged particles moving in a magnetic field make it enjoyable and less stressful. User-friendly explanationsare givenalong with animations. Following topics are covered:

1. Magnetic field.2. Relation between electric and magnetic fields3. Motion of charged particle in a ‘uniform’ magnetic field.4. Magnetic force on a current carrying wire.5. Torque on a wire loop having current flow.

Solved problems and test questions are given at the end. Sample image ofa bar magnet’s field :-

This course is very important . The course includes visual images and animations of magnetic fields setup around a conductor carrying a current flow. User-friendly explanationsare givenalong with animations. Following topics are covered:

1. Biot-Savart law2. Magnetic field for a straight wire with current flowing in it.3. Force of attraction/repulsion between 2 parallel wires having current flow.4. Magnetic field for a circular wire with current flowing in it.5. Ampere’s Law.6. Magnetic field at a point outside a straight wire with current.7. Solenoid and its magnetic field.

Solved problems and test questions are given at the end. Sample image ofa solenoid’s magnetic field :-

This course has some deep concepts, which are normally not very obvious. A number of 3D visual images and animations help to grasp the difficult conceptual part quite easily.Following topics are covered:

1. Magnetic field lines are closed curves (unlike electric fields)2. A bar magnet is equivalent to a solenoid with small currents flowing.3. Torque on a bar magnet kept in a magnetic field.4. Magnetic scalar potential.5. Earth’s magnetism. The earth’s magnetic North and South poles.6. Practical: using Dip Circle apparatus to find dip.7. Practical: Tangent Galvanometer8. Practical: Moving Coil Galvanometer9. Shunt10. Tangent law of perpendicular fields.11. Practical: Deflectionmagnetometer.12. Practical: Oscillation magnetometer.13. Gauss’s Law for magnetism.

Solved problems and test questions are given at the end. Sample image ofplanet earth’s magnetic axis (North-South):-

This course has some deep concepts on Magnetic Field , which are normally very confusing . Videos with 3D solid model images and animations help to grasp this difficult and abstract topic much more easily and quickly.Following topics are covered:

1. Magnetic Field - basics. Magnetic field 'H', and 'B'. 2. Magnetization 'M' - concept and equation between H, B, and M.3. Paramagnetism, Ferromagnetism, Diamagnetism.4. Magnetising Field Intensity (H) , magnetic field (B), and the difference between them.5. Permeability6. Curie’s Law / Curie temperature.7. Magnetic Hysterisis - concept, and graph of 'M' versus 'H' 8. Soft Iron and steel

It is a very important subject, yet is not easy.This course is about time factor and changes in the interactingelectrical and magnetic fields. 3D Images / Animations are presented along withuser-friendly explanations, to make this course a lot more digestible.Following topics are covered:

1. Faraday’s Law of electromagnetic induction.2. Direction of induced current.3. Lenz’s Law.4. Induced emf.5. Induced electric field.6. Eddy current.7. Self-induction.8. Solenoid :-Self-induction 9. L-R circuit : growth an decay of current.10. Energy stored in an Inductor.11. Mutual Inductance.12. Induction Coil.

This chapter talks about the practical devices that work on Alternating current (AC) and Direct Current (DC).

This course shows how a moving AC waveform looks, and the rotating pointer that defines the equation for the wave. An animation of a rotating turbine wheel in a hydraulic dam as the water falls, helps to understand from where we get the AC upto our homes. Many more animations are presented to give a crystal clear grasp and confidence in the working principle of Generators, Motors, Transformers, as well as AC circuits like R, C, L, CR, LR and LCR circuits.Following topics are covered:

1. AC waveform and equation.2. Fleming’s Left Hand Rule and Right Hand Rule – a recap.3. DC Motor

4. AC Generator : induced current, induced emf.5. Hydraulic dam and Turbine wheel6. Instantaneous and RMS current.7. Simple AC circuits:- R, C, L , CR, LR, and LCR circuits. 8. Choke coil.

9. Transformer.10. Step-up and step-down transformers.11. Why power transmission is done at high voltage.

This course describes light as an electromagnetic wave. This was of course a great scientific discovery, since previously it could not be imagined how light has anything to do with electricity and magnetism.Following topics are covered:

1. Maxwell’s displacement current.2. Maxwell’s Equations :- a collection of the 4 major equations.3. Speed of electromagnetic wave is same as speed of light.4. Wave intensity (energy crossing /area/time).5. Radiation in atmosphere.

Solved problems and test questions are given at the end

This course has images and animations to explain current flow through vacuum or gases at low pressure , such as in cathode ray tubes etc.Following topics are covered: 1. Current through gases at low pressure.2. Cathode rays.3. Thomson’s experiment : to find e/m of electron.4. Millikan Oil-drop experiment- to find ‘e’5. Thermionic emission.6. Diode valve.7. Half-wave rectification.8. Full-wave rectification.9. Triode valve.10. Triode as amplifier.

This course has images and animations to explain the photoelectric effect, which can only be explained by particle nature of light. This keeps the debate going , on light being both a particle and a wave at the same time, depending on the situation.Following topics are covered: 1. Photoelectric effect.:- threshold wavelength.2. Practical: Experiment to study photoelectric effect. Stopping potential.3. Why wave theory is not able to explain photoelectric effect.4. Electrons too behave both as particle and wave.

This course has images and animations to explain the various theories given by scientists about how things look like, inside atoms. An animation is included to show the hydrogen atom, the simplest one.

Following topics are covered: 1. Rutherford model.:- positives and drawbacks.2. Hydrogen spectra: sharply defined wavelengths were found.3. Bohr’s model.4. Allowed energies and orbits of hydrogen atom.5. Ground state and excited state, ionization potential.6. Limitation of Bohr’s model.7. Electron as a wave and a particle both.8. Quantum states.9. Laser.10. Laser applications.

This course has images / animations to explain X-rays.Following topics are covered: 1. What is an X-Ray, how is it produced:- a description of X-Ray tube. A look at X-Rays as Electromagnetic radiationas well as a photon particle.

2. Why do we say "characteristic X-Rays" ? which character?

3. What is meant by Braking Radiation or Brehmsstralung radiation

4. Cut-off wavelengths, and graph of Energy versus wavelength.

5. Soft and Hard X-rays.6. How can we place X-Rays in the overall spectrum of all radiations?

7. Uses of X-rays.

Solved problems are given at the end.

This course has images / animations to explain semiconductors principle and devices.Following topics are covered: 1. Conductor versus semi-conductor2. Energy bands in solids.3. Semiconductor: conduction band and valence band.4. p-type and n-type semiconductors.5. Effect of temperature on conductivity.6. p-n junction7. p-n junction diode, LED, zener diode.8. p-n junction acting as Rectifier.9. Transistor:- n-p-n.10. Transistor as amplifier.11. Logic gates.12. ‘AND’ and ‘OR’ gates using Diodes.13. ‘NOT’ gate using Transistor.14. ‘NAND’ and ‘NOR’ gates.

This course explains nuclear forces.Following topics are covered:1. Nuclear forces.2. Binding energy.3. Radioactive decay.4. Law of radioactive decay. Half-life.5. Medical uses of nuclear radiation.6. Producing Nuclear energy – by fusion or fission.7. A Uranium Nuclear reactor.8. The sun- a place of Fusion .

This course explains the greatest theories of science, discovered by Dr.Albert Einstein.Following topics are covered:

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