Q2. An electron with kinetic energy of 2x101® J is moving to the right along the axis of a cathode-ray tube as shown in figure. There is an electric field with magnitude of E = 2 X 10ʻ N/C in the region between the deflection plates. The direction of the electric field is shon in the figure. Everywhere else, E=0. Fluorescent screen Deflection plates (a) How far is the electron from the axis of the tube when it reaches the end of the plates? (b) At what angle is the electron moving with respect to the axis? 4 cm 12 cm (c) At what distance from the axis will the electron strike the fluorescent screen?

For the circuit shown in the figure, what is the current on the 8-2 resistor? www 8 Ω __AW_____AN WWW 3Ω 2Ω O4 A O 1 A 5 A 12 Ω 1.5 A 45 V 5 Ω

2 Unconventional Currents Electrical current does not always flowing through copper wires. Current is defined as the amount of charge passing through an area per unit time. Use this fundamental definition to determine the current in the following situations. (a) Synchrotron radiation is emitted by charged particles traveling at relativistic speeds and is used to study the struc- ture of molecules, crystals, and proteins. In a 6 GeV electron synchrotron, electrons travel around a circular path 240 m long. It is normal to have about 1011 electrons circulating when the machine is in operation. The speed of the electrons is nearly the speed of light. What is the current of the electron beam? (b) In an electrolytic cell, a current flows through a chemical solution and the flowing ions participate in chemical reactions. Suppose that 3.0g of gold is deposited on the negative electrode of an electrolytic cell over a period of 3 hours. What is the average current through the cell during this…