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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`.

A

`76`

B

`70`

C

`67`

D

`50`

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The correct Answer is:
A
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