Moving Charges and Magnetism Problems - Numerical 12

An electron is projected with a speed of 10⁵ms^-¹ at right angles to a magnetic field of 0.019 G. Calculate the radius of the circle described by the electron.

Sub Topics

Suggested solution:

Suggested solution:

Let R be the radius of the circular path described by the electron.

Then mv²/R = B e v or R = mv/B e.

Given: B = 0.019; G = 0.019 x 10^-⁴; T = 1.9 x 10^-⁶ T

Therefore, R = 9.1 x 10^-³¹ x 10⁵/1.9 x 10^-⁶ x 1.6 x 10^-¹⁹

= 0.299m