Exam x om/courses/1478658/quizzes/1990021/take Question 1 10 p What is the direc

Question

Exam x om/courses/1478658/quizzes/1990021/take Question 1 10 p What is the direction of the magnetic force on a negative charge that moves as shown in the figure? O No force down (South) O up (North) O left (West) Question 2 10 pts A cosmic ray electron moves at 6.5 x 106 m/s perpendicular to the Earth's magnetic field at an altitude where field strength is 1.24 10 3 T. What is the radius (in meters) of the circular path the electron follows? The charge of an electron is 1.6 x 1019 C and its mass is 9.11 x 103m Your answer should be a number with two decimal places, do not include the unit.

Explanation / Answer

1. Using the formula of Magnetic Force, F = q (V X B)

and using Right hand thumb rule for cross product of V X B, magnetic Force direction is up (North)

Answer : Up (North)

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