17: Exam Questions

Question 1

[2] Calculate the force on a positron as it moves through a uniform magnetic field with a speed of 1.7 x 10⁷ ms⁻¹
magnetic field strength = 0.45 T
charge on positron = 1.6 x 10⁻¹⁹ C

Answer 1

F = qvB
= 1.7 x 10⁷ * 0.45 * 1.6 x 10⁻¹⁹
= 1.2 x 10⁻¹²