An alpha-particle (m = 6.64×10 −27 kg, q = 3.2×10 −19 C) travels in a circular path of radius 25 cm in a uniform magnetic field of magnitude 1.5 T. What is the speed of the particle? 1.8 × 10^7 m/s 4.8 × 10^7 m/s 2.8 × 10^7 m/s 3.8 × 10^7 m/s
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An alpha-particle travels in a circular path of radius in a uniform magnetic field of magnitude 1.5 T.