A Proton Moving at a Speed of 3

Multiple Choice

A proton moving at a speed of 3.8 × 10⁶ m/s cuts across the lines of a magnetic field at an angle of 40°.The strength of the field is 0.25 × 10−⁴ T.What is the magnitude of the force acting on the proton? (q_p = 1.6 × 10−¹⁹ C)

A) 1.4 × 10−¹⁷ N
B) 2.3 × 10−¹⁷ N
C) 9.8 × 10−¹⁸ N
D) 5.1 × 10−¹⁸ N