c29p7_5e) An electron that is moving through a uniform magnetic field has a velocity v =...
c29p7_5e) An electron that is moving through a uniform magnetic field has a velocity v = (40 km/s)i + 27 km/s)j when it experiences a force F = (-3.300
Homework Answers
Force due to magnetic field F=v cross B
=> F,v and B are mutually perpendicular
F and v are in x-y plane => B has only z component
Let B=0i+0j+p k
F=v cross B
(-3.3*10^-15 i + 4.889 * 10^-15 j) = (40000 i + 27000j)cross(p k)=(27000p i - 40000p j)
=>27000p = -3.3*10^-15 and -40000p = 4.889*10^-15
=> p = 1.22*10^-19 T
Therefore B = 0i+0j+pk where p = 1.22*10^-19 T
magnitude of B = p = 1.22*10^-19
Bz = p = 1.22*10^-19
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