Main Physics 212 Topics

• Summary of In-Class Activities

Magnetic Fields - Ampere's law
Motion of charged particles in a CRT;Effect of field created by coils
Magnetic Deflection (Maple)
Applying Electric and Magnetic Fields - Measure e/m
Faraday's-Lenz's Law - Induced currents
Faraday Law (Maple)
Homework on Inductance
Induced fields and currents - relation to motion
RL circuits - graphs, decay/charging times, etc.
Faraday-law problem (Maple)
LC and LCR Circuit equations (Maple)
RLC circuits - graphs, decay times, frequency of oscillations
AC circuits - graphs, phases, resonance frequency, impedance, reactance

• Summary of Learning Objectives

Lesson 7 Magnetic Fields and Forces
7-1: Magnetic Force on a Charged Particle
Keywords: Charges Moving In A Magnetic Field; Circulating Charges;
OBJECTIVE:Calculate the force on a moving charged particle in a uniform magnetic
field; for the case of vperpendicular to B, find the radius and/or frequency of the
resulting circular orbit.
7-2: Magnetic Forces and Torques on Current-Carrying Conductors
Keywords: Charges Moving In A Magnetic Field; Magnetic Forces; Torque On a Current
Loop;
OBJECTIVES:Calculate the force on a current- carrying wire in a uniform magnetic
field.Calculate the magnetic moment of a current loop; use this to determine the torque
on such a loop in a uniform magnetic field.
7-3: Motion of Charges in Combined Eand BFields
Keywords: Lorentz Force Law; Hall Effect;
OBJECTIVE:For problems with balanced electric and magnetic forces (Hall effect, velocity
selectors) use the relation v = E/B to relate the fields to parameters such as the Hall field
or potential difference, current density, or charge sign and velocity.