PHYS 2002 Final: In Class Problems 5
Document Summary
Problem 1 a conducting rod of length l is being pulled to the right along a set of frictionless conducting rails. An external force pulls the rod along at a constant speed v. the rod and rails sit in a uniform magnetic field b that points everywhere out of the page. The rails and rod form a closed electrical circuit with a resistor whose value is r. derive an expression for the power dissipated in the resistor in terms of v, r, l, and b. Use rhr 1 and the concept of motional emf to show that a magnetic force is opposing the motion of the rod. p g g p y. Problem 2 a conducting rod is free to slide without friction on two conducting rails. Describe its motion once the switch is closed. Problem 5 transcranial magnetic stimulation (tms) is a noninvasive method for studying brain function, and possibly for treatment as well.
