Question

Calculate the magnetic field when an electron having momentum of 9-1 * 102 kg m s
has a circular radius of path of 0-3 m.

Answer 1

Explanation:

The radius of the helical path of the electron in the uniform magnetic field is

r=eBmv⊥=eBmvsinθ=(1.6×10−19C)×(0.15T)(2.4×10−23kgms−1)×sin30o

=5×10−4m=0.5×10−3m=0.5mm