Physics%20202B-Homework-4%20%28Magnetism%290-1

Physics%20202B-Homework-4%20%28Magnetism%290-1 - Physics...

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Physics 202B Homework-4 (Magnetism-Ch. 20) 1.  A proton moves perpendicular to a uniform magnetic field  B  at 1.00 × 10 7  m/s and experiences an  acceleration of 2.00 × 10 13  m/s 2  in the + direction when its velocity is in the + direction. Determine  the magnitude and direction of the field.  2.  Consider an electron near the Earth’s equator where the Earth’s magnetic field is horizontal and  pointing north. In which direction does it(electron) tend to deflect if its velocity is directed ( a downward, ( b ) northward, ( c ) westward, or ( d ) southeastward?  3.  A wire having a mass per unit length of 0.500 g/cm carries a 2.00-A current horizontally to the  south. What are the direction and magnitude of the minimum magnetic field needed to lift this wire  vertically upward?  4.  A conductor suspended by two flexible wires as shown below has a mass per unit length of 0.040 0 
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Physics%20202B-Homework-4%20%28Magnetism%290-1 - Physics...

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