An Electron Is Moving at a Speed of 6 $\degree$ With Respect to a Uniform Magnetic Field of 8

question 14

Multiple Choice

An electron is moving at a speed of 6.0 x 10⁶ m/s at an angle of 30 $\degree$ with respect to a uniform magnetic field of 8.0 x 10^-4 T.What is the radius of the resulting helical path? (m_e = 9.11 x 10^-31 kg,q_e = 1.6 x 10^-19 C)

• A)8.5 cm
• B)4.3 cm
• C)3.7 cm
• D)2.1 cm

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