Published By
Created On
9 Jun 2021 14:57:51 UTC
Transaction ID
Cost
Safe for Work
Free
Yes
IB Physics - Electromagnetic Induction - Ep. 02: Basic Principle
EM induction finally explained in simple terms!
This second episode details the basic principle of EM induction: How to generate electricity by moving a conductor in a magnetic field.
Watch this video: if suddenly you were moved back in time thousands of years ago, you would know how to produce electricity: Take a piece of metal, move it around a magnet the right way and you’ve got yourself a battery!
The video explains what happens within the metallic bar when you move it in a magnetic field, and how this results in an emf across the bar. Then an example is shown where a bar is sliding on metallic rails, which are themselves connected to a load (Resistance or lamp bulb). This set up is an electric circuit where the battery is the moving bar!
We prove that the mechanical energy provided to move the bar is equal to the electrical energy dissipated in the load (Conservation of energy).
In the first episode: https://youtu.be/N44pn9rYtbE, we gave a basic example of application of EM induction (The dynamo in a lamp), as well as the three basic principles to be understood in order to study EM induction in good conditions
_ The effect of a magnetic field on a moving charge (F= qvB),
_ The effect of an electric field on a charge located between two charged plates (F=qE),
_ The effect of a magnetic field on a wire carrying an electric current (F=ILB).
This course is based on the IB Physics HL program.
If you enjoy this video and find it useful for your studies, please like the video and subscribe to the channel!
Edouard Andre Reny, PhD in material science, is a private tutor in Physics. Website: http://www.physics-tutor.nl
Background music composed and produced by Edouard Andre Reny. Website: http://www.synaptic-machines.com
...
https://www.youtube.com/watch?v=l_-OfNT0B2M
This second episode details the basic principle of EM induction: How to generate electricity by moving a conductor in a magnetic field.
Watch this video: if suddenly you were moved back in time thousands of years ago, you would know how to produce electricity: Take a piece of metal, move it around a magnet the right way and you’ve got yourself a battery!
The video explains what happens within the metallic bar when you move it in a magnetic field, and how this results in an emf across the bar. Then an example is shown where a bar is sliding on metallic rails, which are themselves connected to a load (Resistance or lamp bulb). This set up is an electric circuit where the battery is the moving bar!
We prove that the mechanical energy provided to move the bar is equal to the electrical energy dissipated in the load (Conservation of energy).
In the first episode: https://youtu.be/N44pn9rYtbE, we gave a basic example of application of EM induction (The dynamo in a lamp), as well as the three basic principles to be understood in order to study EM induction in good conditions
_ The effect of a magnetic field on a moving charge (F= qvB),
_ The effect of an electric field on a charge located between two charged plates (F=qE),
_ The effect of a magnetic field on a wire carrying an electric current (F=ILB).
This course is based on the IB Physics HL program.
If you enjoy this video and find it useful for your studies, please like the video and subscribe to the channel!
Edouard Andre Reny, PhD in material science, is a private tutor in Physics. Website: http://www.physics-tutor.nl
Background music composed and produced by Edouard Andre Reny. Website: http://www.synaptic-machines.com
...
https://www.youtube.com/watch?v=l_-OfNT0B2M
Author
Content Type
Unspecified
video/mp4
Language
English
More from the publisher
Controlling
VIDEO
IB PH
ib-physics-circular-motion-training
Circular Motion, Training exercises. Suitable for IB and A-Level Physics students.
Objectives: training yourself with circular motion concepts
Content:
Exercise 1: converting angular velocity units, finding period and frequency, relationship between angular and linear velocity.
Exercise 2: determining arc, period, angular velocity, centripetal acceleration and force.
Exercise 3: studying the circular motion of a swirling mass attached to string. Determining the tension in the string.
You can get free access to tons of free resources that will help you with your studies of high school physics by visiting the website:
https://www.physics-made-easy.com/
Presented by Edouard Reny, PhD in solid state chemistry, and private tutor in physics for international high school students.
Edouard provides one-on-one private tuition in Physics (face to face or by Skype). If you wish to contact him, visit his website: https://www.physics-tutor.nl
...
https://www.youtube.com/watch?v=KH4XSTOr2is
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
IB PH
ib-physics-exam-preparation-motion-of-a
This video is aimed at IB students studying HL or SL Physics.
It can also help students preparing other diplomas in getting their grips with electric fields.
In this episode, we will be working on an exercise inspired by a past paper that deals with the motion of a charged particle (a proton) in a uniform electric field between two charged plate.
When the exercise text appears on the screen, pause the video and work it out by yourself. Then, we will review the exercise together. When relevant, I will remind the viewer about concepts required to solve the exercise.
This video is produced and presented by Edouard Reny, Ph.D. in materials sciences and private tutor in Physics.
http://www.physics-tutor.nl/
Please subscribe to get notified when new support video are posted!
***************** Text of the exercise ******************
1/ a proton originally at rest is accelerated in vacuum through a potential difference of 3kV. Calculate the final speed of the proton. (2 Marks)
2/ Once the proton has reached this speed, it is directed on a trajectory midway between two parallel metallic plates, located 1 cm from each other, as shown in the diagram (see video). A potential difference of 500V is applied between the plates. This creates an electric field between the plates.
a/ What is the direction of the field lines. Describe their distribution what this implies for the electric field (1 Mark)?
b/ Calculate the magnitude of the electric field strength between the plates (2 marks)
c/ We assume that the electric field is zero outside of the region between the plates: the proton will enter the electric field at the moment it enters the region between the plates. Determine the magnitude and the direction of the acceleration of the proton when located between the plates. (3 marks)
d/ The length of the plates is 4 cm. Prove that the proton hit the plates? (3 Marks)
...
https://www.youtube.com/watch?v=w0HPh7GCrWY
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
HOW T
how-to-solve-1d-kinematics-questions
Learn how to solve Linear Motion questions promptly and without any pain!
This class will teach you the SUVAT method to solve questions in Linear Motion (AKA Kinematics). You can view it in full here by signing up to this platform full of resources that is Skillshare:
https://skl.sh/2UTpsI0
And by the way, by using this link you get 2 month free ;-)
***************************
Motion is a subject that appears in all areas of physics where you need to be able to predict the path of a body when it is subjected to a constant force (thus a constant acceleration).
This class will show you in five clearly defined steps how to figure this out when the motion is in 1 dimension. It comes with many exercises for you to train on. With a little practice, you should soon become a master at solving motion questions!
Content of the class:
Video 1: The lesson itself presenting the SUVAT method and exemplifying it on practical examples.
Video 2: A mathematical proof of the motion equations which are used. Not absolutely necessary to handle the questions, but a great way to review your algebra.
Video 3 + Video 4: 4 exercises for you to work on, all followed by a detailed correction.
Exercises are also provided as pdf files under two forms: Full picture (to view on a screen), or printable (so that you can work on the exercises away from the computer). Answers are provided also in a pdf document.
***************************
This class is part of a larger course named “Gravity, The Basics”.
“Gravity, The Basics” explores the elementary notions of Newtonian gravity.
Class 1: “Linear Motion” (because being comfortable with it will allow you to make the most of the full course). This class can be taken by itself.
Class 2: “Newton’s Universal Law of Gravitation”
Class 3: “Gravitational Fields”
Class 4: “Circular Motion”
Class 5: “Orbital Motion”
Class 6: “Wrapping-up and Gravity Quiz”
This class is suited for end high school and early University students taking Physics. Any person interested in Physics and in need of a refresher on linear motion will also enjoy this class.
***************************
Presenter: Edouard Reny, PhD, Tutor in Physics and owner of Physics Made Easy.
Website: www.physics-tutor.nl
...
https://www.youtube.com/watch?v=2JIoYbRSqnk
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
ENERG
energies-in-an-atom-(-ib-physics-atomic
The energy of an atom... What does it mean ?
In this first Episode of the Atomic Physics series, we discuss the concept of energy, and how it can be derived into the sum of Potential and Kinetic Energies.
We also define the difference between the concepts of mechanical energy and Internal energy.
This leads us to conclude that when someone mentions the energy of an atom, he or she is talking about the atom's internal energy.
We dig deeper and analyse where this energy comes from, and realize that the energy of an atom is actually the energy of its electrons.
As an example, we consider in this video the simplest case: The atom of Hydrogen.
If you wish to follow this program please view the following episodes:
Episode 2: "What is light", that describes how an atom can gain or lose energy.
https://youtu.be/XwNsi1vzjTs
Episode 3: "Energy levels of an atom", that explains that the energy of an atom can only take specific values. This shows why atoms can be characterized by their emission or absorbtion spectra.
https://youtu.be/MHJO6pm-hoM
Episode 4 derives the energy of an atom and proves with calculus what is proposed in episode 3. (demonstration required for the IB HL program in Physics).
https://youtu.be/YW_g3dy0HOg
Episode 5 is a training exercise aimed at exam preparation (IB Physics and A-Levels Physics)
You want an access to great resources that will help you with your studies of Physics? Then, visit the website!
https://www.physics-made-easy.com/
This video is produced and presented by Edouard Reny, Ph.D. in materials sciences and private tutor in Physics.
Edouard provides one-on-one private tuition in Physics (face to face or by Skype). If you wish to contact him, visit his website: https://www.physics-tutor.nl/
...
https://www.youtube.com/watch?v=g9ieCabz_PI
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
THE C
the-conventional-current-(electricity,
In an electrical circuit, the current is always represented flowing from the positive terminal of a battery to the negative terminal. At the same time, you have learned that electricity in a circuit consists in the motion of negative charge carriers, electrons, flowing from the negative pole to the positive pole. This can be quite confusing for students!
Fundamentally the correct model is that of the electron flow, however, practically, it is consensual to say that a current is a flow of positive charges: this current is called the conventional current. Why do we do that? and why it is OK to do so? This video will answer these two questions.
First, we’ll look at the why. The reasons are historical. So, for the first time, I invite you for a time travel, through some of the history of discovery of electricity. This will make you understand why we use the conventional current model instead of the more accurate electron flow model.
Then, we’ll check that considering a conventional current when studying an electric circuit produces an equivalent impact on the relative charge displacement in the circuit. And we'll also see that does not impact calculation related to the energy conversion that the circuit provides.
I hope these 12 minutes will lift any confusion and allow you to enjoy more your study of electrical sciences!
- - - - - - - - -
Structure of the video:
00:00 Electron flow vs. conventional current (Introduction)
00:54 Content of the video « The Conventional Current »
01:08 Benjamin Franklin – The birth of the electrical current
03:10 Joseph John Thomson – The discovery of the electron
05:01 The birth of the conventional current
06:15 Conventional current model – why it is OK to use it (context: motion of charges)
07:39 Conventional current model – why it is OK to use it (context: transfer of energy)
10:06 The arbitrary choice of the sign of the charge of the electron (alt-history)
10:51 Electron flow model vs. conventional current model – which to choose (Conclusion)
- - - - - - - - -
Link to Benjamin Franklin’s book :
Experiments and Observations on Electricity (Published in 1751)
(public domain = it’s free)
https://physics-made-easy.com/wp-content/uploads/2023/12/Experiments-and-Observations-on-Electricity_benjaminFranklin.pdf
- - - - - - - - -
Prior knowledge required
In order to fully grasp the content of this video, the viewer needs to be familiar with the following concepts already presented in a PME video.
_ What is a charge : https://youtu.be/8VN8MDn4CFA
_ What is an electric potential: https://www.youtube.com/watch?v=j3GrOKre__0
It would also be useful to know:
_ What is a magnetic field: https://youtu.be/NOQK57fgu80?si=VkhRu3i5lXYPrCSu
- - - - - - - - -
Credits :
The script, the illustrations, the music and the video were produced and presented by Edouard Reny, Ph.D. in solid state chemistry and private tutor in Physical Sciences.
- - - - - - - - -
Need help with your high school physics ?:
Edouard provides one-on-one private tuition in Physics (face to face or by Skype). If you wish to know more about this, or contact Edouard, visit his website: https://www.physics-tutor.nl/ or this one (for French speakers : https://profdephysique.fr
...
https://www.youtube.com/watch?v=XzPOGFgsJfE
Transaction
Created
4 months ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
WHAT
what-is-flux-+-an-introduction-to-gauss
In order to fully grasp electromagnetism, one basic notion that is absolutely essential to understand is the concept of Flux (For example electric flux and magnetic flux).
This is what this video is about! The first section provides an approach to the concept of flux within classical field theory. Then, the second section uses the idea of electric flux to present a major law in electrostatics, Gauss Law.
Finally, at the end of the video and as a direct application of Gauss law, the teacher derives the well known Coulomb’s law that quantifies the force between two electric charges.
- - - - - - - - -
Structure of the video:
00:00 Introduction
00:48 Content of the Video
01:59 What is flux ?
05:57 How to calculate flux
08:35 Gauss Law
11:00 Gauss Law: why is the flux independent of the Gaussian Surface ?
12:44 Gauss Law: why is the flux only depends on the enclosed charge ?
13:32 Deriving Coulomb’s law from Gauss Law
- - - - - - - - -
In order to fully grasp the content of this video, the viewer needs to be familiar with the following concepts already presented in a PME video.
_ What is a charge : https://youtu.be/8VN8MDn4CFA
_ What is a field : https://youtu.be/_n_jRP8u1gI
_ What is an electric field : https://youtu.be/hrHCj09_dpc
- - - - - - - - -
The script, the illustrations (Except the drawing of the sphere – see other credits section), the music and the video were produced and presented by Edouard Reny, Ph.D. in solid state chemistry and private tutor in Physical Sciences.
Edouard provides one-on-one private tuition in Physics (face to face or by Skype). If you wish to know more about this, you can contact Edouard or visit his website: https://www.physics-tutor.nl/ (Or this one for French speakers : https://profdephysique.fr/ )
- - - - - - - - -
Other credits
The drawing of the sphere (Chanchocan Vector) was produced by: Nicoguaro, CC BY-SA 2.5 (https://creativecommons.org/licenses/by-sa/2.5), via Wikimedia Commons. It was then modified by Edouard Reny for use in this video.
...
https://www.youtube.com/watch?v=ANXIdrb30dc
Transaction
Created
8 months ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
ELECT
electric-circuits-tip-3-draw-arrows-for
Tip 3: Prepare the analysis of a circuit by drawing first arrows for potential differences and currents.
This video is the third of a series of 5 tips that will help you understand electric circuits. It is aimed at IB Physics, A-level physics and AP Physics students.
Check out the other tips for a more complete picture :
Tip 1: Consider charges circulating in a circuit as carriers of energy. Getting grips with this concept will allow you to have a more intuitive approach in solving circuit problems.
https://youtu.be/p-z-o2n61fs
Tip 2: When relevant, think in potentials at a point instead of voltages (voltage = potential difference).
https://youtu.be/GVmZ-72Efkw
Tip 4: Take advantage of Kirschhoff laws.
https://youtu.be/EERWWUlAwoE
Tip 5: Calculate equivalent resistance of two resistors in parallel in seconds!
https://youtu.be/WD5u-wrwBpY
I am also uploading some exam preparation exercises that will give you a very practical methodology to solve circuits with a minimum of effort!
Exercise 1: for circuits with a single battery.
https://youtu.be/H0gyq3284x4
Exercise 2: for circuits with multiple batteries.
https://youtu.be/CpYryUtMdcw
Have fun and good luck!
Edouard
- - - - - - - - - - -
Edouard Reny, Ph.D. in materials science, is a private physics tutor for international IB, A-level and AP students. Need more info? Visit www.physics-tutor.nl.
...
https://www.youtube.com/watch?v=_M8HIeArqR4
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
IB PH
ib-physics-circular-motion-exam
Circular Motion, Exam Preparation exercises. Suitable for IB Physics students.
Objectives: preparing for an exam where circular motion concepts are required.
Content:
Exercises here are based on past papers and all required circular motion concepts to get solved. these are more challenging than in previous videos. Make sure you understand the basics first !
Exercise 1: mechanics, conservation of energy and circular motion. A ball slides down a slope and enters a loop...
Exercise 2: Mechanics and circular motion. A mass is swirled vertically. Minimum speed required to keep the string holding the mass straight ?
Exercise 3: Friction and circular motion. calculating the maximal angular velocity of a rotating disc so that an object placed on it does not get ejected from the surface of the rotating disc.
You can find tons of free resources that will help you with your studies of high school physics by visiting the website:
https://www.physics-made-easy.com/
Presented by Edouard Reny, PhD in solid state chemistry, and private tutor in physics for international high school students.
Edouard provides one-on-one private tuition in Physics (face to face or by Skype). If you wish to contact him, visit his website: https://www.physics-tutor.nl/
...
https://www.youtube.com/watch?v=-6HV4NVYWtg
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
TIME
time-dilation,-an-introduction-to
Time Dilation, an introduction to Special Relativity.
The flow of time depends on the motion of whoever measures it. This sounds quite counterintuitive, even weird, but, it is reality: time and space are intimately linked. With the progress of science that occurred by the end of the 19nth century, the first hints of this relationship were showing up. And it’s Einstein that put it all together in 1905 with his theory of special relativity.
This video discusses time dilation, a specific effect of special relativity. The pedagogical approach here is different than from other videos you might find on Youtube, or even text books. I keep it simple, and limit myself to basic mathematics only. I believe that trying to teach Special Relativity from scratch and comprehensively in a 20-minute video is nonsense. That is why I preferred to focus on time dilation as an introduction to the subject. See this video as a super teaser, and a motivator to learn more. In the conclusion of the video, I give you a direction to follow if you wish to dig further (Lorentzian transformations).
What will you learn in this video:
_ What is an inertial frame of reference (and detecting those frames which are not inertial),
_ The 2 postulates at the heart of special relativity and what these imply (basically, that’s what started the whole story),
_ What is time dilation and how to visualize it,
_ A derivation of the time dilation formula (where the most advanced maths that is used is the Pythagorean Theorem!),
_ The notion of proper time interval, that allows you to spot immediately which frame of reference has the shortest time interval between two events (very useful to solve problems),
_ Application example + exercise to check that you’ve got it, and that you can solve high school and early university time dilation questions.
Enjoy and have fun discovering this model of the Universe!
Edouard
- - - - - - - - -
Structure of the video:
00:00 Introduction
01:30 Content of the video
02:13 What is an inertial frame of reference?
05:10 The first postulate of special relativity
06:49 The second postulate of special relativity
08:56 Time dilation and the photon clock
10:50 Deriving the time dilation formula and the relativistic factor
13:11 The proper time interval
15:21 How to solve time dilation questions? (Special Relativity)
17:57 What we have learned of Special Relativity in this video
18:14 How to dig deeper into Special Relativity (explore Lorentzian transformations)
18:38 Conclusion
- - - - - - - - -
Prior knowledge required
In order to fully grasp the content of this video, not much is needed. The viewer needs to be familiar with:
_ Basic algebra
_ the fact that speed = distance / time interval
- - - - - - - - -
Credits :
The script, the illustrations, the music and the video were produced and presented by Edouard Reny, Ph.D. in solid state chemistry and private tutor in Physical Sciences.
- - - - - - - - -
Need help with your high school physics ?:
Edouard provides one-on-one private tuition in Physics (face to face or by Skype). If you wish to know more about this, or contact Edouard, visit his website: https://www.physics-tutor.nl/ or this one (for French speakers) : https://profdephysique.fr/.
...
https://www.youtube.com/watch?v=ilaBOHorFis
Transaction
Created
2 months ago
Content Type
Language
video/mp4
English