This question has multiple parts. What is the electric potential at points A, B, and C? What is the potential energy of an electron at point A? What is the potential energy of an electron at point B? What is the potential energy of an electron at point C? What is the potential difference ΔVAB? What is the potential difference ΔVBC?

2. The figure shows two parallel plates. The graph indicates the potential at points (X1= 0.300 m and X2= 0.400 m) between two plates, with V2 = 20 V and V1= 15 V. An electron is released from rest at x1, and that release point and the plate locations are aligned with the graph. What is the electrons speed (m/s) just as it runs into the plate? (You must decide which plate it hits) helpful info:: grap wo plate it hits.) V₂ V₁ 0 A | | X₁ X₂ e (Electron charge q = -1.6 x 10¹9 C, AK-q AV, electron mass = 9.1 x 10-³¹ kg, V=Joule/Coulomb, 1 eV = 1.6 x 10¹9 J, K-mv²/2)

11. An electron in the picture tube of an old television set is accelerated from rest through a potential difference Vba = +5000V. a. What is the change in potential energy of the electron? (ans: -8.0 x 1010 J) b. What is the speed of the electron as a result of this acceleration? (ans: 4.2 x 10' m/s) c. What is the speed of a proton that is accelerated through a potential difference Vba = - 5000 V? (ans: 9.8 x 10° m/s) 020-12-11 Page 4 of 17

A proton has an initial speed of 5.0×105 m/s. Please give a correct/clear explanation of all constants or values used to solve each part: a> What potential difference is required to bring the proton to rest? Express your answer using two significant figures.  b>What potential difference is required to reduce the initial speed of the proton by a factor of 2? Express your answer using two significant figures.  c>What potential difference is required to reduce the initial kinetic energy of the proton by a factor of 2? Express your answer using two significant figures.