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I have some questions about magnetic fields and current flows in general.

Lets say in these eg., A vertical wire carries a current straight up in a region where the magnetic field vector points due NORTH. What direction of the resulting force on this current?

EX1) No using the right hand method if my thumb points in the positive flow of current then my fingers should curl in theBof the force, correct? SO I am correct to say that the force on this currrent would be EAST.

EX2) An electron has an initial velocity to the south but is observed to curve upward as the result of the magnetic fied. The direction of the field is? My answer using the right hand method would be upward.

I am somewhat confused. Am I correct to say that when I want to find a force on a magntic field I use the rt hand method with the thumb points with the current. There are so many ways to use the rt hand methid for different scenarios I am confused with it?

Something lse that confuses me and this is an actual problem here.

An electron moving along the +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, +z out of the page)

I am suppose to find its direction which I believes travels in the _x direction traveling CW, am I correct to say this.

The answers are multiple choice for this particluar problem.

a) +z

b) -z

c) -y

d) -x

Any help with these problem and my questions would be immensely appreciated.

Thanks!

Dx

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# Homework Help: Magnetic fields and current flows problem

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