Question #179044

a proton moving at right angle in a magnetic field of 0.1 T, experience a force of 2*10^-12N, thus the speed of proton is


1
Expert's answer
2021-04-08T09:01:35-0400

Solution. The magnitude of the magnetic force on a charge particle


F=qvBsinθF=qvBsin\theta

where F is force; q=1.6 * 10^-19C is charge of the proton; v is speed of proton; Ɵ=900 is angle between magnetic field and velocity.

Therefore, the speed of proton is equal to


v=FqBsinθ=2×1012N1.6×1019C×0.1T=1.25×108msv=\frac{F}{qBsin\theta}=\frac{2\times10^{-12}N}{1.6\times10^{-19}C\times0.1T}=1.25\times10^8\frac{m}{s}

Answer.

v=1.25×108msv=1.25\times10^8\frac{m}{s}


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