Question

an electron of mass 9×10^-31 kg moves in a circle or radius 2cm with a speed of 3×10^6m/sec in a magnetic field.If a proton of mass 1.8 ×10^-27 kg were to move in a circle of the same radius in the same field its speed would be
a) 6×10^4m/sec b)1.5×10^4m/sec
c) 6×10^3m/sec d) 1.5 ×10^3m/sec​

Answer 1

Answer:

option A ,is the correct answer