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Physics Honors/AP 1 and 2

Chapter 20: 1-4 Assignment

Course Materials are always under revision! Weblecture content may change anytime prior to two weeks before scheduled chat session for content.

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Homework

Physics 20: 1-4 Magnetic Fields

Homework

Reading Preparation

Text Reading: Giancoli, Physics - Principles with Applications, Chapter 20: 1 to 4

Study Points

Key Equations

Force on electric current in a uniform magnetic field F   =   IlB   sin   θ Note that the Force is a vector and requires a direction, given by the right-hand rule. This relationship is a vector cross-product, written F = lIB. The magnitude of a cross-product is calculated usng the sine of the angle θ between I and B, which is maximum when θ is 90°.
Force on a moving charge in a magnetic field F   =   q t   l   B   sin   θ F   =    q ( l t   )   B   sin   θ F =   qvB   sin   θ   The direction of the cross-product is at right angles to the plane containing the vectors involved.

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Whether it is up or down depends on the right-hand rule.

Web Lecture

Read the following weblecture before chat: Magnetic Fields

Study Activity

Use the physics simulation for a Charged Particle in a Magnetic Field.

  • Start the simulation using default values. What happes to the charged particle? Retain the trace and compare paths as you make the following changes.
  • Double the mass of the particle. How does the particle's path change?
  • Reset and double the velocity of the particle. How does the particle's path change?
  • Reset and double the charge on the particle. How does the particle's path change?
  • Reset and double the magnetic field strength. How does the particle's path change?
  • What happens if you change the sign on the charge from positive to negative?

Interactive Physics Simulations are provided at the GeoGebra site GeoGebra site.

Chat Preparation Activities

Chapter Quiz

Lab Work

If you want lab credit for this course, you must complete at least 12 labs (honors course) or 18 labs (AP students). One or more lab exercises are posted for each chapter as part of the homework assignment. We will be reviewing lab work at regular intervals, so do not get behind!