Uploads from Physics Made Easy

Currently Playing: What is a Magnetic Dipole Moment ? (Electromagnetism, Physics)

Dipole Moments, maybe you’ve heard about this concept at school or at university? Maybe you even have used them when solving a question or problem related to electromagnetism? Yet, do you actually know what these things truly represent? Well, with this video, you will! Magnetic dipole moments (MDMs) play a crucial role in various scientific domains: _ Of course in Physics, you cannot get around these little beasts if you study electromagnetism. _ In Chemistry MDMs are important in understanding the behavior and structure of atoms and molecules. _ In Material Sciences, MDMs are obviously intimately related to the magnetic properties of materials. _ The Medical sector rely strongly on MDMs for imaging detailed images of the body (MRI). _ Planetology models the magnetic field of a planet by considering an MDM at the center of the planet. _In electrical engineering, the concept of MDM is used when designing or analyzing circuits which involve electromagnetic fields. So you see, understanding the notion of dipole moment is a must have for any student that is interested in science. In can be a little abstract, so the first part of the video introduces the viewer to something a little more familiar, electric dipole moments. Then, by mathematical analogy, magnetic dipole moments are presented and their true nature revealed. When the video ends, stay a little… After the shooting, I took a few improvised rushes just for fun. For the first time, you will see me sharing a thought while in a state of complete improvisation. If you want more of these in future videos, let me know in the comment section of the video when it comes out. Enjoy, #electromagnetism #physics #magneticfield - - - - - - - - - Structure of the video: 00:00 Introduction 00:29 Content of the video 00:46 What is an Electric Dipole Moment? 02:17 The electric field generated by an electric dipole moment. 03:33 Effect of an external electric field on an electric dipole moment 04:45 What is a Magnetic Dipole Moment? 05:39 The magnetic field generated by a magnetic dipole moment 06:58 Effect of an external magnetic field on a magnetic dipole moment 07:59 Two solid definitions of a magnetic dipole moments 09:17 Magnetic Dipole Moments and the spin of an electron (improvised thoughts) - - - - - - - - - Correction in the video: The formula for Biot-Savart Law presented at 5minutes 45seconds, is not in phase with the graphical representation. According to the graphic the r vector in the numerator has a magnitude, but in the formula it should be considered like a unit vector. Thus, to allign graphical representation with the formula, the formula should have r^3 in the denominator instead of r^2. - - - - - - - - - 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 other PME videos. _ 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 It would also be useful to know: _ What is a flux : https://youtu.be/ANXIdrb30dc?si=RY7Z_1RjZGe53_EE _ 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/.