Question 2 for week 4 lab: Using F = qE, F = ma, y = 1/2at^2, and x= v(0) * t, prove, meaning show the work that, y = qEx^2/2mv(0)^2. v(0) is the initial velocity in the x direction entering the plates. Does this formula look familiar? Does the path look familiar? It should. You saw it back in physics part one when you studied 2D kinematics motion of an object under free fall in 2D. It is parabolic path. You saw this when you studied projectile motion. Funny how motion under gravity and electromagnetic forces produce similar phenomenon
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lab :
Lab 4 Review textbook Chapter 16 which involves the vector characteristics of a moving charged object within a charged parallel plate capacitor.
This simulation can be downloaded from within your course under "PH221.Simulations"; its file name is "#15 Charge and Cap.ip".
A positively charged particle is moving horizontally when it enters the region between the plates of a capacitor as the simulation illustrates.
(a) Draw (sketch) the trajectory that the particle follows in moving through the capacitor. (b) When the particle is within the capacitor, which of the following four vectors, if any are parallel (||) to the electric field E inside the capacitor: the particle's displacement (), its velocity (v), its linear momentum (p), and its acceleration (a)? For each vector, explain why the vector is or is not parallel to the electric field of the capacitor.
Run the simulation noting the particle's trajectory (as indicated by the "tracking" or "strobes") while inside the capacitor cavity. Also note the velocity and acceleration vector, v and A, respectively arrows. Fill in the answers for the blanks in the Lab Answer Sheet at the end of this lab.
A capacitor is a charge storage device. A parallel plate capacitor consists of parallel conducting plates separated by an insulator. In this experiment, the insulator is air and there is equal but opposite charges (+Q and -Q) placed on each conducting plate (See Fig 16-33 and 16-36 and 17-1 example 17-2. in your textbook). This virtual lab investigates the effects (if any) of a positively charged particle midway between the oppositely charged plates of a parallel plate capacitor moving in a + x-direction. Just as in Lab 3, there will exist an electrostatic (Coulomb) force on the charged particle when it is inside the capacitor.