S97s(2) - Physics 4B THIRD EXAM Chapters 22 - 32 Spring...

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1 Physics 4B THIRD EXAM Chapters 22 - 32 Spring 1997 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. An electron is traveling northward at 3.20x10 6 m/s near Chico where the magnetic field of Earth is northward and has a magnitude of 52.0μT at 62˚ below the horizontal. (a)Find the horizontal component of the field and (b)the vertical component of the field. (c)Find the magnitude and direction of the force exerted on the electron by the horizontal component of the field and (d)the vertical component of the field. (a)Taking the vector components, B h = Bcos ! = 52.0cos62˚ = 24.4 μ T (b) and B v = Bsin ! = 52.0sin62˚ = 45.9 μ T . (c)The force on a moving charge is,
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S97s(2) - Physics 4B THIRD EXAM Chapters 22 - 32 Spring...

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