Chapter 29: Sources of the Magnetic Field Use the Biot-Savart Law to determine the magnetic field produced by a wire, and be familiar with its applications to straight wires, "infinitely" long straight wires, and curved wires. You will not have to do full derivations of B wires / wire segments / loops but should be familiar enough with them to answer questions about the process. Use right-hand rules to demonstrate the direction of the magnetic field produced by a current in a wire at various locations Use Ampere's Law to determine the magnetic field produced by cylindrically-symmetric objects Wires (both inside and outside the conductor), concentric wires/cylinders solenoid/toroid Understand Gauss' Law for magnetism. Why is the net magnetic flux through any closed surface zero, regardless of whether magnets are or are not contained inside the surface? (and how does this differ from Gauss' Law for electric fields and electric charges?) Know how to calculate magnetic flux for given loop areas, magnetic fields, and loop-field orientations. You do not need to prepare for anything from Section 29.6 (Magnetism in Matter) Chapter 30: Faraday's Law Understand the nature of Faraday's Law - that only a changing magnetic flux will produce an emf (and a current, if there is a complete conducting loop) Know how to calculate the emf induced in a bar moving through a magnetic field (&=-Blv) Know different ways of changing the magnetic flux through a loop Calculate currents in sliding-bar circuits such as the one in Figure 30.8 (Section 30.2) Understand and use Lenz's Law to determine the induced magnetic field (recall the 4-step process from class) and current in a conducting loop due to a change in magnetic flux through the loop. Know that a consequence of Faraday's Law is that changing magnetic fields will produce electric fields (the general form is Eq. 30.8) Motors, generators, and eddy currents (Sections 30.5-6) are applications of Faraday's and Lenz's Laws- you should understand the basics behind them, but they will not be specific topics of questions for this exam. (Their underlying principles however - the aforementioned laws - are things you will need to know.)