Homework Answers
a) Fm = q ( v X B)
Fm = 1.6 x 10^-19 x 100000 x 6 x 10^-5 = 9.6 x 10^-19 N
b)
magnetic force will be perpendicular to the direction of velocity .
(Fm = q ( v X B))
hence particle will move in circular path,
Fm = m v^2 / r
q vB = m v^2 / r
r = mv / qB = (1.6 x 10^-27 x 100000) / (1.6 x 10^-19 x 6 x 10^-5)
r = 16.67 m (radius of circular path )
c) v = i
q = -ve
B = north to south pole (south to north of earth direction)
B = +j
F = - ( i x j) = -k
downward
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