If you watched the previous video, you should be familiar with the method and idea of the RHR (right-hand rule), which you will apply in this section of the course as well. When looking at wires in a closed circuit (implying an electric current running through them) you can calculate the magnetic force that wire has. After solving with math, you can find the direction of the magnetic force vector by using your RHR. A great demonstration of how people have utilized this rule is in the electric motor. If youd like to learn more regarding magnetic forces from a wire, then definitely check out how electric motors operate (specifically, DC motors). Next well get into how a wire can induce a magnetic field on its own.
Moving charges in magnetic fields experience forces. Since currents in wires are moving charges, current-carrying wires in magnetic fields experience forces.
The magnitude of the force on a current-carrying wire perpendicular to a uniform magnetic field is given by F=ILB.
Electric motors operate by placing a current-carrying loop of wire in a uniform magnetic field, creating a net torque. As the loop of wire rotates 180 degrees, the current must either switch direction or be turned off with a device known as a commutator.
Forces on Current-Carrying Wires
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book includes a comprehensive review of the key AP Physics C concepts and targeted strategies for acing every section of the exam. Additionally, the book includes two full length practice tests with full answer explanations.
The book offers a complete review of your AP course, strategies to give you the edge on test day, and plenty of practice with AP-style test questions. It includes 2 full length practice exams modeled on the real test, 3 separate plans to fit your study stle, review material updated to the most recent tests, and all the terms and concepts you need to know.