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Magnetic field applied on a cyclotron is...

Magnetic field applied on a cyclotron is `0*7T` and radius of its dees is `1*8m`. What will be the energy of the emergent protons in `MeV`? Mass of proton`=1*67xx10^-27kg`.

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`E=(q^2B^2r^2)/(2m)=((1*6xx10^-19)^2xx(0*7)^2xx(1*8)^2)/(2xx1*67xx10^-27)J=((1*6xx10^-19)^2xx(0*7)^2xx(1*8)^2)/(2xx1*67xx10^-27xx1*6xx10^-13)MeV`
`=76MeV`
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