An electron moving with a kinetic energy...

An electron moving with a kinetic energy of `1.5 xx 10^(3)` eV enters in a region of uniform magnetic field of induction `4 xx 10^(-3) Wb//m^(2)` at right angles to the direction of motion of the electron . The radius of circular path of the electron in the magnetic field is

5.3 cm

3.3 cm

3.8 cm

8.5 cm

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