Calculate magnetic field from magnetic force on a charged particle The magnetic force, charge, and

Taliyah Spencer

Taliyah Spencer

Answered question

2022-05-03

Calculate magnetic field from magnetic force on a charged particle
The magnetic force, charge, and velocity of a particle are given. I am asked to find the magnetic field.
q = 2 μ C
v = ( i ^ + 3 j ^ ) × 10 6 m / s
F = ( 3 i ^ + j ^ + 2 k ^ ) N
B x = 0

Answer & Explanation

Alexzander Guerrero

Alexzander Guerrero

Beginner2022-05-04Added 7 answers

Use the equation of Lorentz force to calculate the field vector.
In your case, there is no electric field. So calculate accordingly.
Given: B x = 0
Take B y and B z to be the other components. Calculate the cross product and then compare the coefficients of the unit vectors, to get the answer.
Hope it helps.
timbreoizy

timbreoizy

Beginner2022-05-05Added 15 answers

Let B = B y j ^ + B z k ^ (since, B x = 0) be the magnetic field then the magnetic force ( F m ) acting on the charge, is given as
F m = q ( v × B )
F m = q ( v × B )
setting the corresponding values of F , q, v & B ,
3 i ^ + j ^ + 2 k ^ = 2 × 10 6 × 10 6 ( ( i ^ + 3 j ^ ) ) ( B y j ^ + B z k ^ )
3 i ^ + j ^ + 2 k ^ = 2 ( 3 B z i ^ + B z k ^ B y k ^ )
3 i ^ + j ^ + 2 k ^ = 6 B z i ^ + 2 B z k ^ 2 B y k ^
Now, compare the corresponding coefficients on both the sides, to find B y & B z & then the magnetic field B

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