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July 30, 2014

Homework Help: Physics

Posted by sophie on Wednesday, April 22, 2009 at 4:12pm.

A beam of unknown charged particles passes at right angles to the direction of magnetic field of 9.0x10^-2 T. If the speed of the particles is 3.0 x10^4m/s and the force experienced is 8.64x10^-16N, how many electric charges are carried by one particle?


my Work:

F = qvB

q = F/vB = (8.64x10^-16N)/(3.0 x10^4m/s)(9.0x10^-2 T)

q = 0.32 x 10^-14 C

N = q/ (1.6 x 10^-19 C) = (0.32 x 10^-14 C)/ (1.6 x 10^-19 C)

N =0.2 x 10^5 = 2 x 10^4 = 20,000

is this right?

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