Answer:
Correct answer: F = 4.29 N
Step-by-step explanation:
A charged particle moving in a magnetic field is affected by a magnetic force called the Lorentz force and is calculated by the formula.
F = q · v · B sinα
where q is the particle charge, v is the velocity of the particle, B is the magnetic field strength and the alpha- α is the angle between the velocity vector and the direction of the magnetic field vector.
In this case angle α = 90° => sinα = 1
F = 7.12 · 10⁻⁶ C · 1.5 10⁸ m/s · 4.02 10⁻³ T = 42.93 · 10⁻¹ = 4.29 N
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