An electron moves from an initial location between parallel plates where the electric potential is V = 30 Vto a final location where V = 150 V. KU I (a) Determine the change in the electron's potential energy. (b) Determine the average electric field along a10 cm-long line segment that connects the initial and final locations of the electron. Be sure to give both the magnitude and the direction of &. 2. The electric potential difference between two parallelmetal plates is AV. The plates are separated by adistance of 3.0 mm and the electric field between theplates is ɛ =250 V/m. Calculate AV. Ku TA A proton of mass 1.67 X 10-2" kg moves froma location where V; = 75.0 V to a spot whereV = -20.0 V. KU TA (a) Calculate the work, in joules, required to push the electron. (b) Replace the proton with an electron, and determine its change in kinetic energy. . An electron moves from a region of low potential to a region of higher potential where the potential change is +45 V. KU TI (a) Calculate the work, in joules, required to push the electron. (b) What is doing the work? The electrons in an old TV picture tube are accelerated through a potential difference of2.5 x 104 V. KU TA A (a) Do the electrons move from a region of high potential to a region of low potential, or vice versa? (b) Calculate the change in the kinetic energy of one of the electrons. (c) Calculate the final speed of an electron when the initial speed is zero.

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