12 An Electron Mass M 9 1 X 10 31 Kg And Charge Q 1 6 X 10 19 Centers The Region Of A Uniform Electric Field For 1 (42.65 KiB) Viewed 121 times
12 An Electron Mass M 9 1 X 10 31 Kg And Charge Q 1 6 X 10 19 Centers The Region Of A Uniform Electric Field For 2 (41.16 KiB) Viewed 121 times
12. An electron, mass m = 9.1 x 10-31 kg and charge q = -1.6 x 10-19 Centers the region of a uniform electric field, formed by two flat plates, as shown in the figure, with an initial velocity Ur,i = 3.00 x 106 m/s and vy,i = 0. The electric field has a magnitude E = 200 N/C. The length of the plates is l = 0.100 m. After passing through the plates the electrons strike a screen located at the edge of the plates on the right hand end of the plates. This is a projectile motion in the horizontal plane. Assuming the y-coordinate of the electron as it enters the field is y₁ = 0, what is its displacement in the y-direction when it strikes the screen? [10] Y X 155 I I I I 1 I T
13. A square metal bar, of mass 0.720 kg and length 20 cm, rests on two parallel (non-conducting) rails (see figure) that are d = 12.0 cm apart and Ar = 45.0 cm long. The coefficient of kinetic friction between the rails and the bar is 0.2. The metal bar carries a current of I= 48.0 A in the direction shown and slides along the rails. A uniform magnetic field of magnitude 0.240 T is directed perpendicular to the metal bar and the rails(pointing into the page). If it starts from rest at the left end of the rails, what is the speed of the bar as it leaves the rails on the right? [10] Ax d I X X X X X
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