Physics Made Easy: Learn with 3D Simulations & Visuals

In this video, we have explained Working Principle of DC motor.

A direct current or DC motor is a rotary electrical machine that converts direct current Electrical energy into Mechanical energy.

Important Points:

Introduction –Usage of DC motor in real life.

Construction of DC motor.

Working Principle of DC motor.

Usage of Split rings commutator and Carbon brushes

Flaming’s Left hand rule

Factors affecting

Efficiency of DC motor

Reflection of Light | Bending of Light based on Snell's Law

When the ray light passes from a rarer medium to a denser medium, it bends and this is called refraction or bending of light.

In this experiment, we will be using a moveable laser which will be our source of light, a medium that can be changed to four different options, Glass, water, boiling water and single medium and a target which we can move like this.

In this video, we have studied refraction or bending of light based on the example of early sunrise or also known as apparent sunrise and delayed sunset. Refraction or bending of light happens when sun rays pass from the earth's atmospheric layer to us.

One more thing here to notice is that refraction doesn’t occur only the ray of light passes from rarer medium to denser medium but also happens when it passes from a denser medium to a rarer medium. When we take the refractive index of a medium with respect to vacuum, we get an absolute refractive index.

We have calculated the refractive index based on snell's law. We have also mentioned that when an angle of incidence and the angle of reflection is the same, and this is called a total internal reflection. The phenomenon occurs if the angle of incidence is greater then a certain limiting angle called the critical angle.

In this session, we have will understand what is the centripetal force, centrifugal force, frictional force, and how these forces are inter-related.

We have made this video based on a 3D simulation, where we see how the mass, velocity and radius affects the centripetal force and frictional force. Centripetal force is a force that acts on a body moving in a circular path and is directed towards the center around which the body is moving. This word is derived from Latin words centrum meaning "center" and petere meaning "to seek".

The centripetal force depends on the mass of the object, velocity of the object and the radius of the path.

Centrifugal force is a force, arising from the body's inertia, which appears to act on a body moving in a circular path and is directed away from the center around which the body is moving.

The same centripetal force is responsible for the loop-de-loop for roller coasters, a satellite around the earth, in this case, the gravitational force acts as the centripetal force and also, they help for a car to take a turn.

In this experiment, we observe and control the simulation of a person on a merry-go-round to explore what makes a person stay stable or fall off which is usually due to the effects of static frictional force and centripetal force.

The objective of this case is to understand the concept of Centripetal force and the direction in which it acts on a body in a circular motion.

Let’s start this session with something fun!!

This video is based on Speed of Sound how does medium affects the speed of sound.

You all must have seen fireworks. We all love them. All the colors and patterns in the sky! The view is mesmerizing. However, did you notice one thing here?

You see fireworks before, and you hear the sound of bursting of crackers later. Why does this happen? This happens because light travels faster than sound. In order to see the change in speed of sound, we will use three media, Air, water and Solid.

The experiment that we performed in air is called as Bell Jar Experiment. In this experiment we will conclude that sound needs a medium to travel and cannot travel in vacuum.

Second medium is water, we submerge our sound system in water and we conclude that the speed of sound is 4 times higher in water when compared with air and is louder in water when compared with air.

Last medium that we used is a solid rod, and conclusion was breathtaking. Speed of sound is almost 15 times higher in solids when compared to air.

In this video we are going to what is electric current and flow of electrons.

Now we know that electrons move negative terminal to the positive terminal. But, previously, scientists didn't know about this and they assumed that positive ions move from positive to negative terminal.

We still use this method to show the flow of current and this is known as conventional flow of electric current. We can also see that how we use the analogy of water to understand the flow of current. When we add a resistor, the flow of current is reduced. So exactly the flow of electrons is blocked due to the resistor.

We have used a couple of resistors. Higher the power of resistor, lower the flow of current. We have also covered about ohm's law in this video.

What is an earthquake? Earthquakes are caused by the release of energy that generates waves which travel in all directions causing the shaking of the earth’s surface. Earth is not just one piece. It is made up of a jigsaw puzzle of around 19 – 20 pieces which are called tectonic plates. These plates are placed on a hot, partially molten layer of earth’s mantle. This is the reason why these pieces are continuously moving.

An earthquake generates under the earth and this releases the energy across. The point at which the earthquake occurs under the earth is called hypocentre and the exact place above it at the surface of the earth is called epicentre. Earthquakes are of 3 types,Convergent boundary, divergent boundary and Transform fault. The most horrifying earthquake recorded till date was of a magnitude of 9.5 out of 10, this happened in Valdivia in Southern Chile in 1960.

Another one that happened in Japan in Tohuku region was of a magnitude of 9.0 which happened on March 11th, 2011. This earthquake caused massive and enormous damage and destruction and took away nearly 16000 people’s life with­­­ him. Geologists use a device that can sense the waves created by the movement of the tectonic plates. These waves are known as seismic waves and the device is called a seismograph. This records the waves ranging from 0 – 10 where 0 is lowest, where people feel nothing and 10 being the highest that destroy continents. These are measured on the Richter scales.

Today we will learn about Kinetic energy and Potential Energy.

If after reading that sentence the first question you had was, but what even is energy? Then don’t worry, we’ve explained that and many other related physics concepts in this video like elastic potential energy and gravitational potential energy among other things. Learn more about all this on this lesson on kinetic and potential energy for kids and adults.

This entire video is based on an interactive 3D simulators used in Physics.

How does a karate master break bricks in half?

How does a bullet break glass?

Well it all has to do with the physics concept of momentum which is what we are going to learn today in this video Class 9 science-physics video on What is Momentum?

We will learn everything about momentum including, understanding momentum in physics, conservation of momentum using some momentum physics problems and examples.

The study of momentum is the study of physics in motion and that is exactly what you will learn today from definition of momentum in physics to the inherent meaning of momentum.

Have you ever wondered how glasses help people see better?

Well this video will answer these questions and explain to you the concepts concave lenses and convex lenses and about lenses in general.

Your questions like: What is a lens? What are the different types of lenses? And what is the difference between concave and convex lens? Will be answered.

We use convex and concave lenses ray diagrams and simulations to explain to you the concave and convex lens physics from grade 7 to grade 10.

Have you ever thought about what separation processes are used to separate different mixtures?

Have you heard of terms like centrifugation, differential centrifugation, chromatography and paper chromatography and wondered what all these terms meant?

Well this video will help you out with all these questions and will help you understand all these separation techniques, using centrifugation process animations and chromatography animation to teach you all about centrifugal liquid chromatography, sucrose gradient centrifugation and the physics of centrifugation.

What is the separation process used to separate different mixtures?

Have you heard terms like distillation, fractional distillation and simple distillation and wondered what that meant? Well this video will help you out with all these questions and will help you understand all these terms using fractional distillation examples, simple distillation process animation so that you understand the principle of fractional distillation and simple distillation.

We will talk about purification by fractional distillation, fractional distillation procedure, simple distillation process and how fractional distillation works.

Have you ever heard the term vectors and vector calculations and it has just never made sense to you?

This video will help you out with understanding about vector calculation physics, vector calculation rules and parallelogram law of vector addition.

The vector addition parallelogram method will be explained to you including triangle law of vector addition. In the end you will know how to calculate vectors.

What are potential dividers?

This maybe a question all students may have had when they are studying about current dividers and potential dividers or voltage dividers. This is why this video will help you.

This video will explain to you about the current divider formula, voltage divider rule, the potential divider equation and the current divider rule using worked examples in potential dividers and current division rule.

Learn all about current divider rule definition and all other related topics.

The concepts of time, distance and speed are all around us in our life.

But what is the physics of distance, time and speed? Well this is the video to understand that. Understanding this helps you understand distance and speed time graphs you may see in your life or the various time, speed and distance tricks and formula or shortcuts.

This will help you solve class 10 time, distance and speed problems or CAT problems