H2 Physics · JC 2 · Medium · Deflection of charged beams
A proton of charge magnitude 1.6×10−19C moves at right angles to a uniform magnetic field of flux density 0.25T. The magnetic force on the proton is 2.0×10−13N. What is the speed of the proton?
5.0×106m s−1
3.1×105m s−1
8.0×107m s−1
1.3×106m s−1
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