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Electricity and Magnetism
Free Response Question #3 Solutions - AP Physics C 1998 Released Exam
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This Free Response Question includes the following concepts: Magnetic Forces, Current, Motional Emf, Newton’s 2nd Law, Magnetic Flux, Electric Potential Difference, Current, Resistance, Electric Power, Terminal Velocity and using the integral to find the speed as a function of time when the acceleration is not constant.
AP® is a registered trademark of the College Board, which was not involved in the production of, and does not endorse, this product. Enjoy an EDpuzzle Lesson for this video. Link: AP Physics C 1998 Released Exam The problem is on pages 168 - 169 of this pdf. Their solution is on pages 214 - 215 of this pdf. Please enjoy my solutions as well. Content Times: 0:30 A general description of the problem 2:09 Part (a) The Right Hand Rule! 4:18 Part (a) Breaking the Force of Gravity in to its Components 6:46 Part (a) Summing the forces in the Parallel Direction 8:40 Part (b) Deriving Motional emf 11:36 Part (b) Solving for Current 12:07 Part (c) Solving for Electric Power 12:56 Part (d) Reviewing the limits of the speed of the bar 14:06 Part (d) Summing the forces in the Parallel Direction (It’s a little bit different this time) 15:43 Part (d) Substituting in for the Current 16:37 Part (d) Integration! 18:42 Part (d) Substituting in the Limits 21:07 Part (d) Reflecting on how Part (d) was graded 22:33 Part (d) Checking our solution using the limits 23:56 Part (e) Determining what happens to the Equivalent Resistance 25:00 Part (e) Determining what happens to the Terminal Speed |
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