A proton enters a uniform magnetic field at a 90-degree angle Considering the proton's motion in the magnetic field, the magnetic force serves as the OA gravitational force OB. frictional force C. centripetal force OD. tension QUESTION 15 In the previous question, the proton's speed is 621 x 10 m/s, and the uniform magnetic field has a strength of 0 027 T, the radius of the proton's path is m. Exponent format with 3 SF A proton enters a uniform magnetic field at a 90-degree angle Considering the proton's motion in the magnetic field, the magnetic force serves as the OA gravitational force OB. frictional force C. centripetal force OD. tension QUESTION 15 In the previous question, the proton's spoed is 621 x 10 m/s, and the uniform magnetic field has a strength of 0 027 T, the radius of the proton's path is m. Exponent format with 3 SF