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Unformatted text preview: 1 Physics 4B THIRD EXAM Chapters 23 - 32 Fall 1996 Name:_________________________________________ Solve the following problems in the space provided. Use the back of the page if needed. Each problem is worth 20 points. You must show your work in a logical fashion starting with the correctly applied physical principles which are on the last page. Your score will be maximized if your work is easy to follow because partial credit will be awarded. 1. In the lab you conducted the e/m experiment by accelerating electrons with a potential difference of 3000V and sending them into a magnetic field which was adjusted so that the radius of curvature was 26.0cm. Find (a)the speed of the electrons and (b)the strength of the magnetic field. (a)The initial potential energy of the electrons will be converted into potential energy according to the Law of Conservation of Energy. Using the definition of electric potential, Conservation of Energy....
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- Fall '09