Phys259-Labatorial04-Moving-Charges-W2017 - Phys 259 Labatorial 4 Winter 2017 University of Calgary Department of Physics and Astronomy PHYS 259 Winter

# Phys259-Labatorial04-Moving-Charges-W2017 - Phys 259...

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Phys 259, Labatorial 4, Winter 2017 University of Calgary Department of Physics and Astronomy PHYS 259, Winter 2017 Labatorial 4: Motion of electric charges in electric fields A charged particle in an electric field experiences a force, and therefore an acceleration. As a result, the particle gains kinetic energy and/or is deflected from its original direction of motion. These effects are used in many technical applications, from ink jet printers to particle accelerators. The figure shows a technical application of electrostatic acceleration that you don’t see every day: ion propulsion. Here, xenon gas is ionized and then electrically accelerated to a speed of about 25 miles per second (or 144810 km/h). When the xenon ions are emitted from the spacecraft, they push it in the opposite direction (more information at pages/ dawn/news/dawn-20070913f2.html) Goals: To understand and be able to construct the trajectories of electric charges in various electric fields, both uniform and non-uniform. Preparation: Halliday, Resnick, and Walker, “Fundamentals of Physics” 10th edition, Wiley: 22.1–22.2; Labatorial 1. Equipment: Computer with browser to use the simulations at ; the “Electric Field Hockey” simulation ( electric-hockey en.jar ), developed by the PhET Interactive Simulations Project at the University of Colorado, . Note that gravity can be ignored in the problems on this worksheet. 1
Phys 259, Labatorial 4, Winter 2017 1 Motion of a charged particle in a uniform electric field I: Initial velocity parallel to the field Question 1 : The figure shows two infinitely large parallel charged plates. a) How does the electric field ~ E ( x, y ) in the space between the plates depend on position? What is the electric field to the left and to the right of both plates?

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• Summer '19
• Electric charge, positively charged particle

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