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Ek=We
mα∙v²/2 = V∙α
v=√(2V∙α/mα)
Siła Lorentza:
F=α∙v∙B = √(2V∙α³/mα)∙B
Siła Lorentza jest siłą dośrodkową:
F=mα∙v²/r = √(2V∙α³/mα)∙B
r=mα∙(2V∙α/mα)/[√(2V∙α³/mα)∙B]
r=mα∙√(2V∙α/mα)/(α∙B)
T=2πr/v = 2π∙mα/(α∙B)
mα=6.4 * 10^-27 kg
α=3.2 * 10^-19 C
V=4 * 10^-4V
B=4 * 10^-4T
r=6.4 * 10^-27*√(2 * 4 * 10^-4 * 3.2 * 10^-19/(6.4 * 10^-27))/(3.2 * 10^-19 * 4*10^-4) = 0.01 m
T=2 * 3.14 * 6.4 * 10^-27/(3.2 * 10^-19 * 4 * 10^-4) = 0.000314 s = 3.14 * 10^4 s