Atal Tinkering Labs ATL

Orbital Velocity Explained

In this video I discuss the connection between gravity and circular motion, involving satellites. I thus derive the formula used for orbital velocity of a satellite moving in a circular path   For those doing the HSC Physics course, this video addresses the following dot points • analyse the forces involved in uniform circular motion for a range of objects, including satellites orbiting the Earth • define the term orbital velocity and the quantitative and qualitative relationship between orbital velocity,the gravitational constant, mass of the central body, mass of the satellite and the radius of the orbit using Kepler’s Law…

Kepler’s Three Laws Explained

Do you know Kepler’s Laws of Planetary Motion? Do you know how they came about? This video covers that, explains how Newton confirmed them and goes through a worked example of applying Kepler’s Third Law  

projectiles – why 45° give you max range

Have you ever wondered why 45° gives you maximum range? Did you know that for every angle of launch there is another angle that gives you the same range. In this video I show how you can prove both mathematically, simply using the equations of motion.  

Motors vs Generators – explained

Using a demonstration motor, I explain how a motor works, how a generator work, what their similarities are and what their difference are  

JJ thomson and his electron

In this video I review, with the physics explained, how JJ Thomson discovered the electron I briefly review the history prior and also touch on electric fields, magnetic fields and circular motion and how they all contribute to JJ Thomson’s discovery  

galvanometer

In this video I look an application of the motor effect – the galvanometer  

Understanding force between current bearing wires

So why do current bearing wires attract? Why are their spacer between high voltage power lines? In this video I demonstrate and explain why current bearing wires experience a force between each, all due to the motor effect!.  

Eddy and Lenz’ Law Explained

This video covers eddy currents and Lenz’ Law using the well known demonstration of dropping a rare earth magnet down an aluminium tube.  

how speaker works

A short video that explains the physics of a speaker. This video covers the dot point (in the NSW physics syllabus) • identify data sources, gather and process information to qualitatively describe the application of the motor effect in: the loudspeaker  

back emf explained

In this video I discuss the nature of back emf and why a motor burns out when it’s suddenly stops  

Wien’s Law

A short overview of Wien’s Law using the animation from pHET  

Solar Cells simplified

Want to know how a solar cell works. Here is a summary of how a solar cell functions, utilising two key physics concepts – semiconductors and the Photoelectric Effect  

Hertz and Radio Waves Explained

This video examines the experiment Hertz performed to validate Maxwell’s prediction for electromagnetic waves. It also touches on his observation of the photoelectric effect. Prepared to help students doing the HSC in Australia, it is suitable in other jurisdictions as well.  

Black Bodies and Planck Explained

Explaining the theory behind black body radiation, the problems it caused in terms of classical theory, and Max Planck’s solution  

Photoelectric Effect Explained

The 3rd in the series on the photoelectric effect (See my videos on Hertz and Planck) Covers how observations of the photoelectric effect lead to Einstein’s theory in understanding the effect.  

fusion explained

What is nuclear fusion and what doe sit generate energy? Where does the energy from the sun come from? This video answers both questions as it reviews how hydrogen fuses to form helium and generate lots of energy.  

HR Diagram Explained

In this video I review the HR (or Hertzsprung Russell) Diagram. Quickly reviewing the concepts of brightness and colour of a star, I show you how we can classify stars and how that leads to better understanding of the nature of stars.  

How Well do you know Transformers?

Think you know how a transformer works? Test your knowledge by taking the test. A series of multiple choice questions with answers explained  

How well do you know the motor effect?

How well do you know Newton’s Laws?