A long, straight wire carrying a current I, produces a magnetic field, whose value at a distance r from the wire, is (mu_0) I / 2(pi)r, where (mu_0) is called the permeability of free space,
and in SI units, its value is 4(pi)x10^-7 T.m/A. The direction of the magnetic field is determined by the right hand rule: place the thumb of your right hand along the direction of the current,
and the four fingers will then be in the direction of the field.
Two parallel wires carrying currents exert forces on each other. If the currents are parallel, the force will be attractive, and if they are anti-parallel the force will be repulsive.
Magnetic Field Produced by Currents
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.
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 full length practice exams modeled on the real test and all the terms and concepts you need to know.
This book includes a review of all the topics tested including vectors, kinematics, fluid mechanics, optics and nuclear physics. Additionally, the book includes two full length tests made complete with descriptive solutions, and quick study tables for Physics B formulas and equations.