Moving electron under two magnetic fields

[merdeka]

Homework Statement

A coil $\vec{B}$ a current of intensity $i$ created in $M$ a magnetic field $\vec{B}_1$. A magnet $A$ created in $M$ a magnetic field $\vec{B}_2$ .

What is the force undergone by a charge particle $q$ with a velocity $\vec{v}$ that is in $M$ at time $t$ ?

Taking into account the mass of the electron.

Relevant Equations

$F=q\cdot v\cdot B\cdot\sin(\vec{v},\vec{B})$

In this question, I would have to calculate the force in respect to time. However, the question gives me the value of the mass of the electron. In my attempt, I didn't take that into account. I just replaced $v$ with $\frac{d}{t}$ and made the Lorentz force undergone by the particle inversely proportional, but this is probably not correct.

 

[BvU]

Hi,

the force in respect to time

I think the exercise asks for the force at time $t$ and doesn't want you to calculate a trajectory. (For which there is no information given anyway)

 

[merdeka]

Hi,

I think the exercise asks for the force at time $t$ and doesn't want you to calculate a trajectory. (For which there is no information given anyway)

The question didn't give any information or value for a point in time.

 

[BvU]

So we agree on that. At time $t$, position, velocity and field are known. There is no $d$ in the problem and you don't need it. Calculate in a straightforward manner with the equation you mention..