An Electron Is Moving at a Speed of 5

Multiple Choice

An electron is moving at a speed of 5.1 × 10⁶ m/s at an angle of 23° with respect to a uniform magnetic field of 7.3 × 10^-4 T.What is the radius of the resulting helical path? (m_e = 9.11 × 10^-31 kg,q_e = 1.6 × 10^-19 C)

A) 3.7 cm
B) 4.0 cm
C) 3.2 cm
D) 1.6 cm
E) ​3.4 cm