https://physics.kebede.org/ The following website contains notes, slides, videos, and other resources useful in this course. 2025-02-12T15:09:31+03:00 Aaron GK https://physics.kebede.org/ Jekyll © 2025 Aaron GK /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png 2024-12-16T00:00:00+03:00 2024-12-16T00:00:00+03:00 https://physics.kebede.org/posts/magnetic-fields/ Aaron GK

Field of a Magnetic Dipole So far we have not talked about sources of magnetic fields, but even in our discussion of magnetic forces, we have not made any mention of magnetic charges that behave in magnetic fields the same way that electric charges behave in electric fields – with forces that act along the field lines, rather than perpendicular to them. We don’t have the equivalent of Coulomb’...

2024-12-15T00:00:00+03:00 2024-12-15T00:00:00+03:00 https://physics.kebede.org/posts/magnetic-torque/ Aaron GK

Torque on a Loop of Wire Let’s use our result for the force on a segment of wire to analyze the case of the effect of a magnetic field on a closed loop of wire. We will choose a simple geometry for this analysis – a rectangular loop of wire with two sides parallel to a uniform magnetic field. Here are the main features of this set-up: The vertical sides of the rectangular loop are ...

2024-12-14T00:00:00+03:00 2024-12-14T00:00:00+03:00 https://physics.kebede.org/posts/magnetic-force/ Aaron GK

Forces on Moving Charged Particles If we run currents through two parallel wires, something unexpected happens – the wires exert forces on each other! One might be inclined at first to explain this by claiming that putting currents through the wires puts electric charge into them, and that the electric charges are exerting electrical forces on each other. But this is not correct. Current is si...

2024-12-13T00:00:00+03:00 2024-12-13T00:00:00+03:00 https://physics.kebede.org/posts/magnetic-materials/ Aaron GK

Magnetic Materials As with any phenomenon that requires an understanding of what is going on at a microscopic level, magnetism inside of materials like bar magnets is very complicated. We’ll look at a greatly-simplified version of it here, but keep in mind that a fuller understanding can only be achieved through quantum theory. We now know that there are no “magnetic particles” comprising a b...

2024-12-13T00:00:00+03:00 2024-12-13T00:00:00+03:00 https://physics.kebede.org/posts/blog-project-discontinued/ Aaron GK

What’s Up It’s come to my attention that it’s a consensus among the majority that the blog project might not be in the best interests of everyone in its alignment with the national exam. I was debating with myself whether I was making the right decision regarding this matter. With that in mind, I’ve decided to halt this project as a required task as part of this class. I would still be very ha...