H2 Physics · JC 2 · Medium · Deflection of charged beams
A proton moves in a circular path of radius 0.070m in a uniform magnetic field of flux density 0.30T. The magnetic force on the proton is 9.6×10−14N. What is the speed of the proton?
Use F=Bqv and F=mv2/r.
2.0×106m s−1
8.0×105m s−1
6.0×106m s−1
2.0×107m s−1
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